./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF --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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:11:32,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:11:32,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:11:32,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:11:32,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:11:32,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:11:32,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:11:32,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:11:32,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:11:32,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:11:32,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:11:32,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:11:32,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:11:32,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:11:32,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:11:32,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:11:32,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:11:32,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:11:32,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:11:32,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:11:32,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:11:32,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:11:32,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:11:32,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:11:32,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:11:32,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:11:32,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:11:32,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:11:32,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:11:32,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:11:32,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:11:32,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:11:32,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:11:32,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:11:32,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:11:32,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:11:32,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:11:32,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:11:32,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:11:32,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:11:32,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:11:32,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:11:33,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:11:33,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:11:33,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:11:33,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:11:33,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:11:33,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:11:33,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:11:33,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:11:33,025 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:11:33,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:11:33,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:11:33,027 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:11:33,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:11:33,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:11:33,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:11:33,028 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:11:33,028 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:11:33,028 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:11:33,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:11:33,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:11:33,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:11:33,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:11:33,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:11:33,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:11:33,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:11:33,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:11:33,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:11:33,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:11:33,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:11:33,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:11:33,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:11:33,032 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_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2021-11-20 07:11:33,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:11:33,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:11:33,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:11:33,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:11:33,308 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:11:33,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2021-11-20 07:11:33,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/data/0f9d347ff/9fa6c73c46c94110992d8534244c097f/FLAG416f7c40c [2021-11-20 07:11:33,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:11:33,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2021-11-20 07:11:34,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/data/0f9d347ff/9fa6c73c46c94110992d8534244c097f/FLAG416f7c40c [2021-11-20 07:11:34,261 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/data/0f9d347ff/9fa6c73c46c94110992d8534244c097f [2021-11-20 07:11:34,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:11:34,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:11:34,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:11:34,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:11:34,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:11:34,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3306cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34, skipping insertion in model container [2021-11-20 07:11:34,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:11:34,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:11:34,749 WARN L230 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_dcd191a3-7ab4-4039-b838-0da818be3a2d/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2021-11-20 07:11:34,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:11:34,760 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:11:34,799 WARN L230 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_dcd191a3-7ab4-4039-b838-0da818be3a2d/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2021-11-20 07:11:34,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:11:34,831 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:11:34,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34 WrapperNode [2021-11-20 07:11:34,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:11:34,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:11:34,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:11:34,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:11:34,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,913 INFO L137 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2021-11-20 07:11:34,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:11:34,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:11:34,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:11:34,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:11:34,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:34,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:35,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:11:35,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:11:35,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:11:35,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:11:35,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (1/1) ... [2021-11-20 07:11:35,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:11:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:35,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:11:35,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:11:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-20 07:11:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-20 07:11:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:11:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-11-20 07:11:35,110 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-11-20 07:11:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:11:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:11:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:11:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:11:35,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:11:35,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:11:35,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:11:35,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:11:35,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:11:35,241 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:11:35,243 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:11:35,306 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-20 07:11:35,629 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:11:35,637 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:11:35,638 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 07:11:35,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:11:35 BoogieIcfgContainer [2021-11-20 07:11:35,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:11:35,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:11:35,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:11:35,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:11:35,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:11:34" (1/3) ... [2021-11-20 07:11:35,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e3bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:11:35, skipping insertion in model container [2021-11-20 07:11:35,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:34" (2/3) ... [2021-11-20 07:11:35,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e3bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:11:35, skipping insertion in model container [2021-11-20 07:11:35,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:11:35" (3/3) ... [2021-11-20 07:11:35,659 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2021-11-20 07:11:35,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:11:35,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-20 07:11:35,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:11:35,722 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 [2021-11-20 07:11:35,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-20 07:11:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:11:35,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:35,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:35,751 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1721266506, now seen corresponding path program 1 times [2021-11-20 07:11:35,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516053525] [2021-11-20 07:11:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:35,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:35,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:35,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:35,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516053525] [2021-11-20 07:11:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516053525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:35,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:35,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:11:35,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110217479] [2021-11-20 07:11:35,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:35,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:11:35,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:11:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:11:35,964 INFO L87 Difference]: Start difference. First operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:35,988 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-11-20 07:11:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:11:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 07:11:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:35,999 INFO L225 Difference]: With dead ends: 86 [2021-11-20 07:11:35,999 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:11:36,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:11:36,005 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:36,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:11:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:11:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 07:11:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-20 07:11:36,051 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 13 [2021-11-20 07:11:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:36,052 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-20 07:11:36,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-20 07:11:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:11:36,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:36,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:36,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:11:36,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:36,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427249, now seen corresponding path program 1 times [2021-11-20 07:11:36,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:36,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768329966] [2021-11-20 07:11:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:36,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:36,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:36,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768329966] [2021-11-20 07:11:36,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768329966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:36,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:36,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:11:36,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149092126] [2021-11-20 07:11:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:11:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:11:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:11:36,139 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:36,243 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2021-11-20 07:11:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:11:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 07:11:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:36,246 INFO L225 Difference]: With dead ends: 141 [2021-11-20 07:11:36,246 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 07:11:36,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:11:36,248 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:36,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:11:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 07:11:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-11-20 07:11:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.607843137254902) internal successors, (82), 74 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-11-20 07:11:36,262 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 15 [2021-11-20 07:11:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:36,263 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-11-20 07:11:36,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-11-20 07:11:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:11:36,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:36,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:36,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:11:36,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:36,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427248, now seen corresponding path program 1 times [2021-11-20 07:11:36,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397434579] [2021-11-20 07:11:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:36,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:36,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:36,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397434579] [2021-11-20 07:11:36,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397434579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:36,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:36,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:11:36,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946722497] [2021-11-20 07:11:36,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:36,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:11:36,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:11:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:11:36,385 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:36,526 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2021-11-20 07:11:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:11:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 07:11:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:36,529 INFO L225 Difference]: With dead ends: 142 [2021-11-20 07:11:36,531 INFO L226 Difference]: Without dead ends: 142 [2021-11-20 07:11:36,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:11:36,533 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 67 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:36,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 197 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:11:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-20 07:11:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2021-11-20 07:11:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.588235294117647) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-20 07:11:36,566 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 15 [2021-11-20 07:11:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:36,567 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-20 07:11:36,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-20 07:11:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:11:36,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:36,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:36,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:11:36,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash 840693873, now seen corresponding path program 1 times [2021-11-20 07:11:36,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:36,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869259920] [2021-11-20 07:11:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:36,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:11:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:11:36,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869259920] [2021-11-20 07:11:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869259920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318231488] [2021-11-20 07:11:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:36,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:36,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:36,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:36,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:11:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:36,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:11:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:36,992 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 [2021-11-20 07:11:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:37,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:11:37,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318231488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:37,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:11:37,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:11:37,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491262900] [2021-11-20 07:11:37,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:37,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:11:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:11:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:11:37,161 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:37,189 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-11-20 07:11:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:11:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-20 07:11:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:37,193 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:11:37,193 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:11:37,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:11:37,195 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 66 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:37,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 150 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2021-11-20 07:11:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:11:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-11-20 07:11:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.5555555555555556) internal successors, (112), 94 states have internal predecessors, (112), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:11:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2021-11-20 07:11:37,210 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 26 [2021-11-20 07:11:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:37,211 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2021-11-20 07:11:37,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2021-11-20 07:11:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:11:37,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:37,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:37,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:37,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:37,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 840693874, now seen corresponding path program 1 times [2021-11-20 07:11:37,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:37,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819723446] [2021-11-20 07:11:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:37,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:37,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:11:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:11:37,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:37,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819723446] [2021-11-20 07:11:37,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819723446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689673393] [2021-11-20 07:11:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:37,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:37,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:37,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:11:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:11:37,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:37,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:11:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689673393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:37,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:11:37,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-20 07:11:37,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645003676] [2021-11-20 07:11:37,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:11:37,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:11:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:11:37,856 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:37,923 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-20 07:11:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:11:37,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-20 07:11:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:37,924 INFO L225 Difference]: With dead ends: 80 [2021-11-20 07:11:37,925 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:11:37,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:11:37,927 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 453 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:11:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:11:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 07:11:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-20 07:11:37,946 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 26 [2021-11-20 07:11:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:37,947 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-20 07:11:37,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-20 07:11:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:11:37,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:37,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:37,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:38,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:38,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -838491758, now seen corresponding path program 1 times [2021-11-20 07:11:38,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:38,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868785821] [2021-11-20 07:11:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:38,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:38,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:38,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 07:11:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:11:38,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:38,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868785821] [2021-11-20 07:11:38,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868785821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:38,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501216104] [2021-11-20 07:11:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:38,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:38,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:38,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:11:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:38,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:11:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:38,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:11:38,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501216104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:11:38,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:11:38,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2021-11-20 07:11:38,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425277326] [2021-11-20 07:11:38,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:38,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:11:38,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:11:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:11:38,801 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:11:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:39,093 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-11-20 07:11:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:11:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2021-11-20 07:11:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:39,095 INFO L225 Difference]: With dead ends: 103 [2021-11-20 07:11:39,095 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 07:11:39,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:11:39,096 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 25 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:39,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 695 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:11:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 07:11:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2021-11-20 07:11:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-11-20 07:11:39,104 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 31 [2021-11-20 07:11:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:39,105 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-11-20 07:11:39,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:11:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-11-20 07:11:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:11:39,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:39,107 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:39,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:39,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:11:39,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -686979823, now seen corresponding path program 2 times [2021-11-20 07:11:39,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:39,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492431234] [2021-11-20 07:11:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:39,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:39,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:11:39,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:39,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492431234] [2021-11-20 07:11:39,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492431234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:39,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516046777] [2021-11-20 07:11:39,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:11:39,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:39,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:39,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:39,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:11:39,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:11:39,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:11:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:11:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:39,549 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 [2021-11-20 07:11:39,607 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:11:39,607 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 17 treesize of output 19 [2021-11-20 07:11:39,759 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:11:39,760 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 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-20 07:11:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:11:40,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:11:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516046777] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:46,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:11:46,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-20 07:11:46,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566898849] [2021-11-20 07:11:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:11:46,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:11:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=42, Unknown=3, NotChecked=0, Total=72 [2021-11-20 07:11:46,467 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:46,521 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-11-20 07:11:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:11:46,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-11-20 07:11:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:46,523 INFO L225 Difference]: With dead ends: 95 [2021-11-20 07:11:46,523 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 07:11:46,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=27, Invalid=42, Unknown=3, NotChecked=0, Total=72 [2021-11-20 07:11:46,524 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 62 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:46,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 94 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-20 07:11:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 07:11:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2021-11-20 07:11:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 78 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-11-20 07:11:46,531 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 36 [2021-11-20 07:11:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:46,531 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-11-20 07:11:46,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-11-20 07:11:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:11:46,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:46,533 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:46,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:11:46,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:11:46,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash -686979822, now seen corresponding path program 1 times [2021-11-20 07:11:46,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:46,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504534519] [2021-11-20 07:11:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:46,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:46,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:11:46,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504534519] [2021-11-20 07:11:46,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504534519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859704164] [2021-11-20 07:11:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:46,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:46,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:46,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:11:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:11:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:47,004 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 [2021-11-20 07:11:47,056 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:11:47,056 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 15 treesize of output 17 [2021-11-20 07:11:47,228 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:11:47,228 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 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 07:11:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:47,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:11:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859704164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:11:52,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:11:52,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 10 [2021-11-20 07:11:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550529834] [2021-11-20 07:11:52,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:11:52,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:11:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=69, Unknown=1, NotChecked=0, Total=110 [2021-11-20 07:11:52,194 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:11:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:52,322 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-11-20 07:11:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:11:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-20 07:11:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:52,323 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:11:52,324 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:11:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=70, Invalid=111, Unknown=1, NotChecked=0, Total=182 [2021-11-20 07:11:52,325 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 28 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 330 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-11-20 07:11:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:11:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-20 07:11:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-11-20 07:11:52,330 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 36 [2021-11-20 07:11:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:52,331 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-11-20 07:11:52,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:11:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-11-20 07:11:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:11:52,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:52,332 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:11:52,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:52,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:52,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -296648915, now seen corresponding path program 1 times [2021-11-20 07:11:52,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:52,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678811094] [2021-11-20 07:11:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:52,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:52,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:11:52,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678811094] [2021-11-20 07:11:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678811094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:52,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:52,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:11:52,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258269305] [2021-11-20 07:11:52,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:52,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:11:52,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:11:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:11:52,679 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:53,022 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2021-11-20 07:11:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:11:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-20 07:11:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:53,025 INFO L225 Difference]: With dead ends: 170 [2021-11-20 07:11:53,025 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 07:11:53,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:11:53,026 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 483 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:53,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 267 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:11:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 07:11:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 95. [2021-11-20 07:11:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 89 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2021-11-20 07:11:53,032 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 39 [2021-11-20 07:11:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:53,033 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2021-11-20 07:11:53,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2021-11-20 07:11:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:11:53,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:53,035 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:11:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:11:53,035 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash -296648914, now seen corresponding path program 1 times [2021-11-20 07:11:53,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:53,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40442428] [2021-11-20 07:11:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:53,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:11:53,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:53,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40442428] [2021-11-20 07:11:53,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40442428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:53,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:53,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:11:53,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179315998] [2021-11-20 07:11:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:53,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:11:53,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:53,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:11:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:11:53,161 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:53,515 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-11-20 07:11:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:11:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-20 07:11:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:53,517 INFO L225 Difference]: With dead ends: 160 [2021-11-20 07:11:53,517 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 07:11:53,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:11:53,518 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 503 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:53,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 248 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:11:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 07:11:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 95. [2021-11-20 07:11:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.463768115942029) internal successors, (101), 89 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-11-20 07:11:53,524 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 39 [2021-11-20 07:11:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:53,525 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-11-20 07:11:53,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-11-20 07:11:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:11:53,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:53,527 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:11:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:11:53,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1573341240, now seen corresponding path program 1 times [2021-11-20 07:11:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166734958] [2021-11-20 07:11:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:53,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:11:53,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:53,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166734958] [2021-11-20 07:11:53,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166734958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:53,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:53,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:11:53,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687481057] [2021-11-20 07:11:53,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:53,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:11:53,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:11:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:11:53,606 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:53,791 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2021-11-20 07:11:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:11:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2021-11-20 07:11:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:53,793 INFO L225 Difference]: With dead ends: 138 [2021-11-20 07:11:53,793 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 07:11:53,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:11:53,794 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 400 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:53,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 321 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:11:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 07:11:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2021-11-20 07:11:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 89 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-20 07:11:53,799 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 42 [2021-11-20 07:11:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:53,799 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-20 07:11:53,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:11:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-20 07:11:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:11:53,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:53,801 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:11:53,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:11:53,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973534, now seen corresponding path program 1 times [2021-11-20 07:11:53,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:53,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122744593] [2021-11-20 07:11:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:53,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:11:53,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122744593] [2021-11-20 07:11:53,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122744593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066239462] [2021-11-20 07:11:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:53,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:53,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:53,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:11:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:11:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:54,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:11:54,096 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:11:54,096 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 [2021-11-20 07:11:54,106 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 [2021-11-20 07:11:54,171 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 17 treesize of output 13 [2021-11-20 07:11:54,738 INFO L354 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2021-11-20 07:11:54,739 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 57 treesize of output 47 [2021-11-20 07:11:54,745 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 28 treesize of output 26 [2021-11-20 07:11:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:54,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:55,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066239462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:55,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:11:55,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-11-20 07:11:55,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17320653] [2021-11-20 07:11:55,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:55,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:11:55,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:11:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:11:55,107 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:56,518 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2021-11-20 07:11:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:11:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-11-20 07:11:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:56,520 INFO L225 Difference]: With dead ends: 118 [2021-11-20 07:11:56,520 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:11:56,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:11:56,522 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 50 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:56,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 863 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 473 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2021-11-20 07:11:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:11:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2021-11-20 07:11:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 92 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-11-20 07:11:56,527 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 42 [2021-11-20 07:11:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:56,527 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-11-20 07:11:56,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-11-20 07:11:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:11:56,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:56,529 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:11:56,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:56,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:11:56,740 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973535, now seen corresponding path program 1 times [2021-11-20 07:11:56,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509114298] [2021-11-20 07:11:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:56,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:56,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:11:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:56,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:11:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:11:56,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509114298] [2021-11-20 07:11:56,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509114298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650572599] [2021-11-20 07:11:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:56,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:57,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:57,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:11:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:11:57,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:57,113 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 [2021-11-20 07:11:57,120 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 [2021-11-20 07:11:57,220 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:11:57,220 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 [2021-11-20 07:11:57,240 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:11:57,240 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 [2021-11-20 07:11:57,303 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 21 treesize of output 17 [2021-11-20 07:11:57,313 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 [2021-11-20 07:11:57,976 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-20 07:11:57,976 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 86 treesize of output 57 [2021-11-20 07:11:57,990 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:11:57,991 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2021-11-20 07:11:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:58,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:58,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650572599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:11:58,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:11:58,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-20 07:11:58,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552101476] [2021-11-20 07:11:58,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:58,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:11:58,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:11:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:11:58,657 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 25 states, 24 states have (on average 2.5) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:59,734 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2021-11-20 07:11:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:11:59,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-11-20 07:11:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:59,736 INFO L225 Difference]: With dead ends: 118 [2021-11-20 07:11:59,736 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:11:59,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 07:11:59,738 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 64 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:59,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1086 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 462 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2021-11-20 07:11:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:11:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2021-11-20 07:11:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 92 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2021-11-20 07:11:59,744 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2021-11-20 07:11:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:59,745 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2021-11-20 07:11:59,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:11:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2021-11-20 07:11:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:11:59,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:59,746 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:59,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:59,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:11:59,972 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:11:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:59,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1812282727, now seen corresponding path program 1 times [2021-11-20 07:11:59,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:59,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504902295] [2021-11-20 07:11:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:59,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:00,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:00,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:12:00,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:00,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504902295] [2021-11-20 07:12:00,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504902295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:00,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584883742] [2021-11-20 07:12:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:00,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:00,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:00,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:00,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:12:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:12:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:00,252 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 [2021-11-20 07:12:00,290 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 16 treesize of output 12 [2021-11-20 07:12:00,771 INFO L354 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2021-11-20 07:12:00,772 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 47 treesize of output 41 [2021-11-20 07:12:00,776 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 32 treesize of output 28 [2021-11-20 07:12:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:12:00,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:01,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584883742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:01,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:01,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-11-20 07:12:01,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483207368] [2021-11-20 07:12:01,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:01,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:12:01,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:12:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:12:01,016 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:01,718 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-11-20 07:12:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:12:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-11-20 07:12:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:01,720 INFO L225 Difference]: With dead ends: 119 [2021-11-20 07:12:01,720 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 07:12:01,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:12:01,721 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 70 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:01,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1147 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 422 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2021-11-20 07:12:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 07:12:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2021-11-20 07:12:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 92 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2021-11-20 07:12:01,726 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 45 [2021-11-20 07:12:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:01,726 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2021-11-20 07:12:01,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2021-11-20 07:12:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:12:01,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:01,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:12:01,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:01,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:12:01,932 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1813915021, now seen corresponding path program 2 times [2021-11-20 07:12:01,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:01,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535584247] [2021-11-20 07:12:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:01,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:02,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:02,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:12:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535584247] [2021-11-20 07:12:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535584247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:02,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663887469] [2021-11-20 07:12:02,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:12:02,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:02,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:02,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:12:02,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:12:02,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:02,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 07:12:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:02,404 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 [2021-11-20 07:12:02,468 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 [2021-11-20 07:12:02,473 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 [2021-11-20 07:12:02,578 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 [2021-11-20 07:12:02,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:12:02,592 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 [2021-11-20 07:12:02,692 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:12:02,692 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 41 treesize of output 40 [2021-11-20 07:12:02,707 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:12:02,707 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 42 treesize of output 41 [2021-11-20 07:12:03,571 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 103 treesize of output 91 [2021-11-20 07:12:03,962 INFO L354 Elim1Store]: treesize reduction 85, result has 24.8 percent of original size [2021-11-20 07:12:03,963 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 110 treesize of output 85 [2021-11-20 07:12:04,007 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-11-20 07:12:04,008 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 60 treesize of output 53 [2021-11-20 07:12:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:12:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:04,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663887469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:04,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:04,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2021-11-20 07:12:04,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913700814] [2021-11-20 07:12:04,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:04,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:12:04,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:12:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:12:04,559 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:06,198 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2021-11-20 07:12:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:12:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-11-20 07:12:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:06,200 INFO L225 Difference]: With dead ends: 143 [2021-11-20 07:12:06,200 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 07:12:06,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:12:06,202 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 81 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:06,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1665 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 621 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2021-11-20 07:12:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 07:12:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 124. [2021-11-20 07:12:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 116 states have internal predecessors, (131), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:12:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2021-11-20 07:12:06,207 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 45 [2021-11-20 07:12:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:06,208 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2021-11-20 07:12:06,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2021-11-20 07:12:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:12:06,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:06,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:06,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:12:06,410 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash -285859641, now seen corresponding path program 1 times [2021-11-20 07:12:06,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:06,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408901358] [2021-11-20 07:12:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:06,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 07:12:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:12:06,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:06,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408901358] [2021-11-20 07:12:06,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408901358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:06,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657925652] [2021-11-20 07:12:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:06,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:06,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:06,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:12:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:12:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:12:06,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:12:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657925652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:06,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:06,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-20 07:12:06,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712001093] [2021-11-20 07:12:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:12:06,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:12:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:12:06,801 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:12:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:06,872 INFO L93 Difference]: Finished difference Result 189 states and 212 transitions. [2021-11-20 07:12:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:12:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-20 07:12:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:06,875 INFO L225 Difference]: With dead ends: 189 [2021-11-20 07:12:06,875 INFO L226 Difference]: Without dead ends: 189 [2021-11-20 07:12:06,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:12:06,876 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 34 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:06,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 364 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:12:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-20 07:12:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2021-11-20 07:12:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.3545454545454545) internal successors, (149), 130 states have internal predecessors, (149), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:12:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2021-11-20 07:12:06,888 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 47 [2021-11-20 07:12:06,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:06,888 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2021-11-20 07:12:06,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:12:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2021-11-20 07:12:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:12:06,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:06,890 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:12:06,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:12:07,104 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -937654824, now seen corresponding path program 2 times [2021-11-20 07:12:07,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988624016] [2021-11-20 07:12:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:07,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:07,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:12:07,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:07,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988624016] [2021-11-20 07:12:07,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988624016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:07,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677128373] [2021-11-20 07:12:07,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:12:07,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:07,416 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:07,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:12:07,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:12:07,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:12:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:12:07,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:12:08,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677128373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:08,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:12:08,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 26 [2021-11-20 07:12:08,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382486596] [2021-11-20 07:12:08,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:08,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:12:08,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:12:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:12:08,324 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:12:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:08,859 INFO L93 Difference]: Finished difference Result 324 states and 366 transitions. [2021-11-20 07:12:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:12:08,860 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-11-20 07:12:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:08,863 INFO L225 Difference]: With dead ends: 324 [2021-11-20 07:12:08,863 INFO L226 Difference]: Without dead ends: 324 [2021-11-20 07:12:08,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:12:08,864 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 208 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:08,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1489 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:12:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-20 07:12:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 195. [2021-11-20 07:12:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 162 states have (on average 1.271604938271605) internal successors, (206), 182 states have internal predecessors, (206), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 07:12:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 224 transitions. [2021-11-20 07:12:08,877 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 224 transitions. Word has length 48 [2021-11-20 07:12:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:08,878 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 224 transitions. [2021-11-20 07:12:08,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:12:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 224 transitions. [2021-11-20 07:12:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:12:08,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:08,881 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:12:08,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:12:09,082 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -937654788, now seen corresponding path program 1 times [2021-11-20 07:12:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098025226] [2021-11-20 07:12:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 07:12:09,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:09,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098025226] [2021-11-20 07:12:09,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098025226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:09,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:09,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:12:09,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531153063] [2021-11-20 07:12:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:09,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:12:09,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:12:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:12:09,154 INFO L87 Difference]: Start difference. First operand 195 states and 224 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:09,194 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2021-11-20 07:12:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:12:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-11-20 07:12:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:09,196 INFO L225 Difference]: With dead ends: 193 [2021-11-20 07:12:09,197 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 07:12:09,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:12:09,198 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 106 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:09,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 76 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:12:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 07:12:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-20 07:12:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 180 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 07:12:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2021-11-20 07:12:09,207 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 48 [2021-11-20 07:12:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:09,207 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2021-11-20 07:12:09,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2021-11-20 07:12:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:12:09,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:09,209 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:09,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:12:09,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -66371861, now seen corresponding path program 1 times [2021-11-20 07:12:09,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884330021] [2021-11-20 07:12:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:09,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:12:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:12:09,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:09,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884330021] [2021-11-20 07:12:09,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884330021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:09,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491915675] [2021-11-20 07:12:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:09,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:09,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:09,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:09,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:12:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:12:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:12:09,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:12:10,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491915675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:10,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:12:10,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-11-20 07:12:10,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313259058] [2021-11-20 07:12:10,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:10,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:12:10,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:12:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:12:10,246 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:12:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:10,912 INFO L93 Difference]: Finished difference Result 299 states and 349 transitions. [2021-11-20 07:12:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:12:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-11-20 07:12:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:10,915 INFO L225 Difference]: With dead ends: 299 [2021-11-20 07:12:10,915 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 07:12:10,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:12:10,917 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 174 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:10,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1209 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:12:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 07:12:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2021-11-20 07:12:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 183 states have (on average 1.284153005464481) internal successors, (235), 203 states have internal predecessors, (235), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 07:12:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2021-11-20 07:12:10,929 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 50 [2021-11-20 07:12:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:10,929 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2021-11-20 07:12:10,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:12:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2021-11-20 07:12:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:12:10,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:10,931 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:10,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:11,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:11,148 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315603, now seen corresponding path program 1 times [2021-11-20 07:12:11,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:11,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233331806] [2021-11-20 07:12:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:11,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:11,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:11,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:12:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:12:11,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:11,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233331806] [2021-11-20 07:12:11,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233331806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:11,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220367427] [2021-11-20 07:12:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:11,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:11,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:11,427 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:11,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:12:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:12:11,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:11,561 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 [2021-11-20 07:12:11,610 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:12:11,611 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 15 treesize of output 17 [2021-11-20 07:12:11,758 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:12:11,764 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 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 07:12:12,612 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:12:12,614 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 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-20 07:12:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:12:12,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:12:42,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220367427] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:42,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:42,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-20 07:12:42,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718600681] [2021-11-20 07:12:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:42,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:12:42,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:12:42,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=198, Unknown=6, NotChecked=0, Total=272 [2021-11-20 07:12:42,367 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:12:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:42,493 INFO L93 Difference]: Finished difference Result 253 states and 296 transitions. [2021-11-20 07:12:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:12:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-11-20 07:12:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:42,496 INFO L225 Difference]: With dead ends: 253 [2021-11-20 07:12:42,496 INFO L226 Difference]: Without dead ends: 253 [2021-11-20 07:12:42,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=75, Invalid=225, Unknown=6, NotChecked=0, Total=306 [2021-11-20 07:12:42,497 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 104 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:42,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 152 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-11-20 07:12:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-20 07:12:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 215. [2021-11-20 07:12:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 183 states have (on average 1.273224043715847) internal successors, (233), 201 states have internal predecessors, (233), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 07:12:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2021-11-20 07:12:42,511 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 50 [2021-11-20 07:12:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:42,511 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2021-11-20 07:12:42,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:12:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2021-11-20 07:12:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:12:42,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:42,513 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:42,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:42,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:42,716 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315602, now seen corresponding path program 1 times [2021-11-20 07:12:42,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:42,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048049525] [2021-11-20 07:12:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:42,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:43,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:43,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:43,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:12:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:12:43,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048049525] [2021-11-20 07:12:43,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048049525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795171286] [2021-11-20 07:12:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:43,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:43,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:43,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:12:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:12:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:43,219 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 [2021-11-20 07:12:43,282 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:12:43,282 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 15 treesize of output 17 [2021-11-20 07:12:43,460 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:12:43,460 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 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 07:12:44,401 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:12:44,402 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 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-20 07:12:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:12:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:44,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795171286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:44,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:44,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2021-11-20 07:12:44,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905744655] [2021-11-20 07:12:44,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:44,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:12:44,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:12:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:12:44,638 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:12:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:44,954 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2021-11-20 07:12:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:12:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2021-11-20 07:12:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:44,963 INFO L225 Difference]: With dead ends: 236 [2021-11-20 07:12:44,964 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 07:12:44,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:12:44,965 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 23 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:44,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 545 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-11-20 07:12:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 07:12:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 227. [2021-11-20 07:12:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 193 states have (on average 1.2694300518134716) internal successors, (245), 211 states have internal predecessors, (245), 7 states have call successors, (7), 5 states have call predecessors, (7), 10 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 07:12:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 267 transitions. [2021-11-20 07:12:44,978 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 267 transitions. Word has length 50 [2021-11-20 07:12:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 267 transitions. [2021-11-20 07:12:44,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 16 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:12:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 267 transitions. [2021-11-20 07:12:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:12:44,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:44,981 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:45,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:45,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:45,200 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1074364724, now seen corresponding path program 3 times [2021-11-20 07:12:45,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291434408] [2021-11-20 07:12:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:45,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 07:12:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:12:45,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291434408] [2021-11-20 07:12:45,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291434408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851647068] [2021-11-20 07:12:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:12:45,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:45,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:45,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:45,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:12:45,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:12:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:12:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:12:45,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:12:45,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851647068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:45,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:12:45,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2021-11-20 07:12:45,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758823140] [2021-11-20 07:12:45,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:12:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:12:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:12:45,852 INFO L87 Difference]: Start difference. First operand 227 states and 267 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:12:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:46,168 INFO L93 Difference]: Finished difference Result 290 states and 340 transitions. [2021-11-20 07:12:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:12:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-20 07:12:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:46,171 INFO L225 Difference]: With dead ends: 290 [2021-11-20 07:12:46,172 INFO L226 Difference]: Without dead ends: 290 [2021-11-20 07:12:46,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:12:46,173 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 194 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:46,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 839 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:12:46,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-20 07:12:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 201. [2021-11-20 07:12:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 169 states have (on average 1.272189349112426) internal successors, (215), 186 states have internal predecessors, (215), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 07:12:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-11-20 07:12:46,186 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 50 [2021-11-20 07:12:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:46,187 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-11-20 07:12:46,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:12:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-11-20 07:12:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:12:46,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:46,189 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:46,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:46,416 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash 793594527, now seen corresponding path program 1 times [2021-11-20 07:12:46,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477588325] [2021-11-20 07:12:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:46,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:46,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:46,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:12:46,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477588325] [2021-11-20 07:12:46,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477588325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:46,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:46,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:12:46,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590100492] [2021-11-20 07:12:46,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:46,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:12:46,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:12:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:12:46,521 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:46,757 INFO L93 Difference]: Finished difference Result 243 states and 279 transitions. [2021-11-20 07:12:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:12:46,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-11-20 07:12:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:46,762 INFO L225 Difference]: With dead ends: 243 [2021-11-20 07:12:46,762 INFO L226 Difference]: Without dead ends: 243 [2021-11-20 07:12:46,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:12:46,763 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 333 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:46,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 255 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:12:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-20 07:12:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 210. [2021-11-20 07:12:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 195 states have internal predecessors, (230), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 07:12:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 248 transitions. [2021-11-20 07:12:46,778 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 248 transitions. Word has length 51 [2021-11-20 07:12:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:46,779 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 248 transitions. [2021-11-20 07:12:46,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 248 transitions. [2021-11-20 07:12:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:12:46,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:46,781 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:46,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 07:12:46,781 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash 793594528, now seen corresponding path program 1 times [2021-11-20 07:12:46,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:46,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271546473] [2021-11-20 07:12:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:46,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:46,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:12:46,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:46,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271546473] [2021-11-20 07:12:46,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271546473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:46,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:46,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:12:46,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263627331] [2021-11-20 07:12:46,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:46,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:12:46,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:12:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:12:46,916 INFO L87 Difference]: Start difference. First operand 210 states and 248 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:47,191 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2021-11-20 07:12:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:12:47,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-11-20 07:12:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:47,193 INFO L225 Difference]: With dead ends: 243 [2021-11-20 07:12:47,193 INFO L226 Difference]: Without dead ends: 243 [2021-11-20 07:12:47,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:12:47,194 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 383 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:47,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 230 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:12:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-20 07:12:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 212. [2021-11-20 07:12:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 181 states have (on average 1.276243093922652) internal successors, (231), 197 states have internal predecessors, (231), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 07:12:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 249 transitions. [2021-11-20 07:12:47,202 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 249 transitions. Word has length 51 [2021-11-20 07:12:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:47,203 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 249 transitions. [2021-11-20 07:12:47,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 249 transitions. [2021-11-20 07:12:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:12:47,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:47,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:12:47,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 07:12:47,205 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:47,205 INFO L85 PathProgramCache]: Analyzing trace with hash 753850610, now seen corresponding path program 1 times [2021-11-20 07:12:47,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:47,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876281411] [2021-11-20 07:12:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:47,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:47,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:47,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:12:47,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876281411] [2021-11-20 07:12:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876281411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289590094] [2021-11-20 07:12:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:47,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:47,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:47,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:12:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:12:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:12:47,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:12:47,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289590094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:47,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:47,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2021-11-20 07:12:47,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271260412] [2021-11-20 07:12:47,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:47,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:12:47,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:12:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:12:47,619 INFO L87 Difference]: Start difference. First operand 212 states and 249 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:12:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:47,698 INFO L93 Difference]: Finished difference Result 239 states and 279 transitions. [2021-11-20 07:12:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:12:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-11-20 07:12:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:47,700 INFO L225 Difference]: With dead ends: 239 [2021-11-20 07:12:47,700 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 07:12:47,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:12:47,701 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 30 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:47,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 424 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:12:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 07:12:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 210. [2021-11-20 07:12:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 179 states have (on average 1.2681564245810055) internal successors, (227), 196 states have internal predecessors, (227), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 07:12:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2021-11-20 07:12:47,709 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 51 [2021-11-20 07:12:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:47,709 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2021-11-20 07:12:47,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:12:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2021-11-20 07:12:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:12:47,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:47,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 07:12:47,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:47,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:12:47,932 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1396186650, now seen corresponding path program 1 times [2021-11-20 07:12:47,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755942379] [2021-11-20 07:12:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:47,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:47,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 07:12:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:12:48,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755942379] [2021-11-20 07:12:48,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755942379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394823777] [2021-11-20 07:12:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:48,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:48,032 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:48,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:12:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:12:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:12:48,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:12:48,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394823777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:48,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:12:48,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-11-20 07:12:48,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694842881] [2021-11-20 07:12:48,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:48,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:12:48,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:12:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:12:48,487 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:12:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:48,720 INFO L93 Difference]: Finished difference Result 210 states and 246 transitions. [2021-11-20 07:12:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:12:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-11-20 07:12:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:48,722 INFO L225 Difference]: With dead ends: 210 [2021-11-20 07:12:48,722 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 07:12:48,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:12:48,723 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 23 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:48,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1107 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:12:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 07:12:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 190. [2021-11-20 07:12:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 161 states have (on average 1.2608695652173914) internal successors, (203), 177 states have internal predecessors, (203), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:12:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 217 transitions. [2021-11-20 07:12:48,732 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 217 transitions. Word has length 51 [2021-11-20 07:12:48,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:48,732 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 217 transitions. [2021-11-20 07:12:48,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:12:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 217 transitions. [2021-11-20 07:12:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:12:48,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:48,733 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:12:48,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:48,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:12:48,948 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1168374810, now seen corresponding path program 1 times [2021-11-20 07:12:48,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:48,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082525544] [2021-11-20 07:12:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:48,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:12:49,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082525544] [2021-11-20 07:12:49,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082525544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49469135] [2021-11-20 07:12:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:49,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:49,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:49,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:12:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:12:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:49,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-20 07:12:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:12:49,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:12:49,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49469135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:49,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:49,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2021-11-20 07:12:49,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69901307] [2021-11-20 07:12:49,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:49,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:12:49,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:12:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:12:49,343 INFO L87 Difference]: Start difference. First operand 190 states and 217 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:49,513 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2021-11-20 07:12:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:12:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-11-20 07:12:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:49,515 INFO L225 Difference]: With dead ends: 218 [2021-11-20 07:12:49,515 INFO L226 Difference]: Without dead ends: 218 [2021-11-20 07:12:49,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:12:49,516 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 86 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:49,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 549 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-11-20 07:12:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-20 07:12:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2021-11-20 07:12:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 177 states have internal predecessors, (202), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:12:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 216 transitions. [2021-11-20 07:12:49,524 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 216 transitions. Word has length 52 [2021-11-20 07:12:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:49,524 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 216 transitions. [2021-11-20 07:12:49,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:12:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 216 transitions. [2021-11-20 07:12:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:12:49,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:49,525 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:49,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:49,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:12:49,726 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash 162004220, now seen corresponding path program 1 times [2021-11-20 07:12:49,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:49,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431373608] [2021-11-20 07:12:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:49,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:12:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:12:49,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431373608] [2021-11-20 07:12:49,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431373608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:49,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:49,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:12:49,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952105185] [2021-11-20 07:12:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:49,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:12:49,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:12:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:12:49,768 INFO L87 Difference]: Start difference. First operand 190 states and 216 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:49,814 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2021-11-20 07:12:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:12:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-11-20 07:12:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:49,816 INFO L225 Difference]: With dead ends: 204 [2021-11-20 07:12:49,816 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 07:12:49,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:12:49,817 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:49,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 135 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:12:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 07:12:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 189. [2021-11-20 07:12:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 161 states have (on average 1.2484472049689441) internal successors, (201), 176 states have internal predecessors, (201), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:12:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2021-11-20 07:12:49,826 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 54 [2021-11-20 07:12:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:49,826 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2021-11-20 07:12:49,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2021-11-20 07:12:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:12:49,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:49,827 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:49,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 07:12:49,828 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash 162004221, now seen corresponding path program 1 times [2021-11-20 07:12:49,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:49,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871360580] [2021-11-20 07:12:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:49,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:12:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:12:49,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871360580] [2021-11-20 07:12:49,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871360580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:49,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:49,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:12:49,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152476620] [2021-11-20 07:12:49,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:49,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:12:49,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:49,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:12:49,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:12:49,887 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:49,929 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2021-11-20 07:12:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:12:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-11-20 07:12:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:49,931 INFO L225 Difference]: With dead ends: 205 [2021-11-20 07:12:49,931 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 07:12:49,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:12:49,936 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 45 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:49,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:12:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 07:12:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 188. [2021-11-20 07:12:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 175 states have internal predecessors, (200), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:12:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2021-11-20 07:12:49,945 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 54 [2021-11-20 07:12:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:49,945 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2021-11-20 07:12:49,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2021-11-20 07:12:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:12:49,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:49,947 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:49,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 07:12:49,947 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 162004276, now seen corresponding path program 1 times [2021-11-20 07:12:49,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516111414] [2021-11-20 07:12:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:49,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:12:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:49,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:12:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:12:50,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516111414] [2021-11-20 07:12:50,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516111414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:12:50,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:12:50,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:12:50,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127550316] [2021-11-20 07:12:50,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:50,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:12:50,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:12:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:12:50,030 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:50,102 INFO L93 Difference]: Finished difference Result 214 states and 245 transitions. [2021-11-20 07:12:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:12:50,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-11-20 07:12:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:50,105 INFO L225 Difference]: With dead ends: 214 [2021-11-20 07:12:50,105 INFO L226 Difference]: Without dead ends: 214 [2021-11-20 07:12:50,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:12:50,106 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 15 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:50,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 401 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:12:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-20 07:12:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2021-11-20 07:12:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 180 states have (on average 1.238888888888889) internal successors, (223), 194 states have internal predecessors, (223), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:12:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2021-11-20 07:12:50,114 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 54 [2021-11-20 07:12:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:50,115 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2021-11-20 07:12:50,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2021-11-20 07:12:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:12:50,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:50,116 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-20 07:12:50,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 07:12:50,117 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash 658181978, now seen corresponding path program 1 times [2021-11-20 07:12:50,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:50,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877278295] [2021-11-20 07:12:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:50,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:50,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:50,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:12:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:12:50,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:50,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877278295] [2021-11-20 07:12:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877278295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336773026] [2021-11-20 07:12:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:50,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:50,366 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:50,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:12:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 07:12:50,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:50,484 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 [2021-11-20 07:12:50,519 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:12:50,519 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 [2021-11-20 07:12:50,571 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 21 treesize of output 17 [2021-11-20 07:12:50,691 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-20 07:12:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-20 07:12:50,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-20 07:12:50,810 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:12:50,810 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 37 [2021-11-20 07:12:50,825 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 [2021-11-20 07:12:51,711 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:12:51,712 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 127 [2021-11-20 07:12:51,717 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 121 treesize of output 109 [2021-11-20 07:12:52,128 INFO L354 Elim1Store]: treesize reduction 76, result has 27.6 percent of original size [2021-11-20 07:12:52,129 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 70 [2021-11-20 07:12:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:12:52,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336773026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:52,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:52,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-11-20 07:12:52,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941350219] [2021-11-20 07:12:52,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:52,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:12:52,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:12:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:12:52,641 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 32 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:54,495 INFO L93 Difference]: Finished difference Result 310 states and 356 transitions. [2021-11-20 07:12:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:12:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 32 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2021-11-20 07:12:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:54,499 INFO L225 Difference]: With dead ends: 310 [2021-11-20 07:12:54,499 INFO L226 Difference]: Without dead ends: 310 [2021-11-20 07:12:54,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1987, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:12:54,502 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 282 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:54,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 1593 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 990 Invalid, 0 Unknown, 164 Unchecked, 0.8s Time] [2021-11-20 07:12:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-20 07:12:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 212. [2021-11-20 07:12:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 183 states have (on average 1.2459016393442623) internal successors, (228), 197 states have internal predecessors, (228), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:12:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 244 transitions. [2021-11-20 07:12:54,517 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 244 transitions. Word has length 53 [2021-11-20 07:12:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:54,518 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 244 transitions. [2021-11-20 07:12:54,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 32 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:12:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 244 transitions. [2021-11-20 07:12:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:12:54,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:54,519 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-20 07:12:54,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:54,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:12:54,748 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:12:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash 658181979, now seen corresponding path program 1 times [2021-11-20 07:12:54,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:54,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950250108] [2021-11-20 07:12:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:54,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:55,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:12:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:12:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:12:55,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:55,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950250108] [2021-11-20 07:12:55,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950250108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:55,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734354308] [2021-11-20 07:12:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:55,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:55,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:55,219 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:12:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 07:12:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:55,317 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 [2021-11-20 07:12:55,324 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 [2021-11-20 07:12:55,396 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:12:55,396 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 [2021-11-20 07:12:55,409 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 [2021-11-20 07:12:55,497 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 26 treesize of output 22 [2021-11-20 07:12:55,507 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 [2021-11-20 07:12:55,652 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 07:12:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:12:55,676 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-20 07:12:55,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 07:12:55,768 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:12:55,768 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 64 treesize of output 55 [2021-11-20 07:12:55,777 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:12:55,777 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 81 treesize of output 80 [2021-11-20 07:12:58,010 INFO L354 Elim1Store]: treesize reduction 84, result has 25.7 percent of original size [2021-11-20 07:12:58,011 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 170 treesize of output 106 [2021-11-20 07:12:58,038 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-11-20 07:12:58,039 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 85 treesize of output 74 [2021-11-20 07:12:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:12:58,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:58,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734354308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:58,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:58,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-20 07:12:58,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496222041] [2021-11-20 07:12:58,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:12:58,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:12:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:12:58,894 INFO L87 Difference]: Start difference. First operand 212 states and 244 transitions. Second operand has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:01,278 INFO L93 Difference]: Finished difference Result 369 states and 415 transitions. [2021-11-20 07:13:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:13:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2021-11-20 07:13:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:01,281 INFO L225 Difference]: With dead ends: 369 [2021-11-20 07:13:01,281 INFO L226 Difference]: Without dead ends: 369 [2021-11-20 07:13:01,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=371, Invalid=2935, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 07:13:01,283 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 405 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:01,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1885 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1238 Invalid, 0 Unknown, 168 Unchecked, 0.8s Time] [2021-11-20 07:13:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-20 07:13:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 212. [2021-11-20 07:13:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 183 states have (on average 1.2404371584699454) internal successors, (227), 197 states have internal predecessors, (227), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:13:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2021-11-20 07:13:01,292 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 53 [2021-11-20 07:13:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:01,293 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2021-11-20 07:13:01,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2021-11-20 07:13:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:13:01,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:01,294 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:01,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:01,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:01,507 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:01,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1820277497, now seen corresponding path program 1 times [2021-11-20 07:13:01,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:01,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112342732] [2021-11-20 07:13:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:01,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:13:01,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112342732] [2021-11-20 07:13:01,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112342732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:01,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:01,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:13:01,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090691572] [2021-11-20 07:13:01,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:01,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:13:01,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:13:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:13:01,586 INFO L87 Difference]: Start difference. First operand 212 states and 243 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:13:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:01,772 INFO L93 Difference]: Finished difference Result 239 states and 269 transitions. [2021-11-20 07:13:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:13:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-11-20 07:13:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:01,774 INFO L225 Difference]: With dead ends: 239 [2021-11-20 07:13:01,775 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 07:13:01,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:13:01,776 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 349 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:01,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 254 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 07:13:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 213. [2021-11-20 07:13:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 184 states have (on average 1.2391304347826086) internal successors, (228), 198 states have internal predecessors, (228), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:13:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2021-11-20 07:13:01,786 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 54 [2021-11-20 07:13:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:01,786 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2021-11-20 07:13:01,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:13:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2021-11-20 07:13:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:13:01,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:01,788 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:01,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 07:13:01,788 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1067235197, now seen corresponding path program 1 times [2021-11-20 07:13:01,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:01,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462932457] [2021-11-20 07:13:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:01,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:13:01,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462932457] [2021-11-20 07:13:01,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462932457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:01,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:01,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:13:01,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742687184] [2021-11-20 07:13:01,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:01,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:13:01,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:13:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:13:01,838 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:01,854 INFO L93 Difference]: Finished difference Result 249 states and 286 transitions. [2021-11-20 07:13:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:13:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-11-20 07:13:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:01,857 INFO L225 Difference]: With dead ends: 249 [2021-11-20 07:13:01,857 INFO L226 Difference]: Without dead ends: 249 [2021-11-20 07:13:01,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:13:01,858 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 35 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:01,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 176 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:13:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-20 07:13:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 217. [2021-11-20 07:13:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 188 states have (on average 1.2393617021276595) internal successors, (233), 202 states have internal predecessors, (233), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:13:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 249 transitions. [2021-11-20 07:13:01,868 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 249 transitions. Word has length 56 [2021-11-20 07:13:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:01,869 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 249 transitions. [2021-11-20 07:13:01,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 249 transitions. [2021-11-20 07:13:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:13:01,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:01,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 07:13:01,871 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1067235358, now seen corresponding path program 1 times [2021-11-20 07:13:01,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101260160] [2021-11-20 07:13:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:01,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:13:01,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:01,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101260160] [2021-11-20 07:13:01,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101260160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:01,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:01,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:13:01,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220964848] [2021-11-20 07:13:01,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:01,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:13:01,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:13:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:13:01,939 INFO L87 Difference]: Start difference. First operand 217 states and 249 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:13:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:02,018 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2021-11-20 07:13:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:13:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-11-20 07:13:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:02,021 INFO L225 Difference]: With dead ends: 233 [2021-11-20 07:13:02,021 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 07:13:02,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:13:02,022 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 96 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:02,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 208 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 07:13:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-11-20 07:13:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 188 states have (on average 1.2340425531914894) internal successors, (232), 201 states have internal predecessors, (232), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 07:13:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 248 transitions. [2021-11-20 07:13:02,031 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 248 transitions. Word has length 56 [2021-11-20 07:13:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:02,031 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 248 transitions. [2021-11-20 07:13:02,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:13:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 248 transitions. [2021-11-20 07:13:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:13:02,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:02,033 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:02,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 07:13:02,033 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1215436308, now seen corresponding path program 2 times [2021-11-20 07:13:02,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:02,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025286982] [2021-11-20 07:13:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:02,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:02,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:02,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:02,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:13:02,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025286982] [2021-11-20 07:13:02,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025286982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754991537] [2021-11-20 07:13:02,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:13:02,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:02,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:02,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:13:02,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:13:02,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:02,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:13:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:13:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:13:03,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754991537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:03,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:03,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 30 [2021-11-20 07:13:03,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16829117] [2021-11-20 07:13:03,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:03,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:13:03,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:13:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:13:03,175 INFO L87 Difference]: Start difference. First operand 216 states and 248 transitions. Second operand has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 27 states have internal predecessors, (94), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-20 07:13:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:05,535 INFO L93 Difference]: Finished difference Result 473 states and 560 transitions. [2021-11-20 07:13:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 07:13:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 27 states have internal predecessors, (94), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 57 [2021-11-20 07:13:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:05,540 INFO L225 Difference]: With dead ends: 473 [2021-11-20 07:13:05,540 INFO L226 Difference]: Without dead ends: 473 [2021-11-20 07:13:05,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=524, Invalid=3766, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 07:13:05,543 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 473 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:05,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 2005 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:13:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-20 07:13:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 226. [2021-11-20 07:13:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 196 states have (on average 1.239795918367347) internal successors, (243), 210 states have internal predecessors, (243), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (14), 10 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 07:13:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2021-11-20 07:13:05,565 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 57 [2021-11-20 07:13:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:05,566 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2021-11-20 07:13:05,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 27 states have internal predecessors, (94), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-20 07:13:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2021-11-20 07:13:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:13:05,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:05,567 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-11-20 07:13:05,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:05,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:05,784 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash 628630294, now seen corresponding path program 3 times [2021-11-20 07:13:05,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:05,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282884681] [2021-11-20 07:13:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:05,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:05,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:05,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:05,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:13:05,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282884681] [2021-11-20 07:13:05,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282884681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:05,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:05,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:13:05,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837139145] [2021-11-20 07:13:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:05,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:13:05,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:13:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:13:05,968 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:13:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:06,536 INFO L93 Difference]: Finished difference Result 304 states and 347 transitions. [2021-11-20 07:13:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:13:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-11-20 07:13:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:06,539 INFO L225 Difference]: With dead ends: 304 [2021-11-20 07:13:06,539 INFO L226 Difference]: Without dead ends: 304 [2021-11-20 07:13:06,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:13:06,540 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 467 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:06,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 392 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:13:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-20 07:13:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 230. [2021-11-20 07:13:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 200 states have (on average 1.245) internal successors, (249), 214 states have internal predecessors, (249), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (14), 10 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 07:13:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2021-11-20 07:13:06,549 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 57 [2021-11-20 07:13:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:06,550 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2021-11-20 07:13:06,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:13:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2021-11-20 07:13:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:13:06,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:06,551 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-11-20 07:13:06,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 07:13:06,552 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 628630293, now seen corresponding path program 1 times [2021-11-20 07:13:06,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:06,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434768052] [2021-11-20 07:13:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:06,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:06,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:06,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:06,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:13:06,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:06,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434768052] [2021-11-20 07:13:06,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434768052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:06,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:06,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:13:06,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731761313] [2021-11-20 07:13:06,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:06,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:13:06,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:13:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:13:06,645 INFO L87 Difference]: Start difference. First operand 230 states and 269 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:13:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:06,923 INFO L93 Difference]: Finished difference Result 289 states and 332 transitions. [2021-11-20 07:13:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:13:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-11-20 07:13:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:06,925 INFO L225 Difference]: With dead ends: 289 [2021-11-20 07:13:06,925 INFO L226 Difference]: Without dead ends: 289 [2021-11-20 07:13:06,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:13:06,926 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 429 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:06,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 378 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:13:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-20 07:13:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 230. [2021-11-20 07:13:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 200 states have (on average 1.24) internal successors, (248), 214 states have internal predecessors, (248), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (14), 10 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 07:13:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 268 transitions. [2021-11-20 07:13:06,934 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 268 transitions. Word has length 57 [2021-11-20 07:13:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:06,935 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 268 transitions. [2021-11-20 07:13:06,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:13:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 268 transitions. [2021-11-20 07:13:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:13:06,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:06,936 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:06,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 07:13:06,937 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1372073195, now seen corresponding path program 2 times [2021-11-20 07:13:06,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448241199] [2021-11-20 07:13:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:06,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:07,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:13:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:13:07,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:07,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448241199] [2021-11-20 07:13:07,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448241199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:07,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83857410] [2021-11-20 07:13:07,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:13:07,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:07,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:07,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:13:07,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:13:07,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:13:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:07,344 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 [2021-11-20 07:13:07,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:13:07,487 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:13:07,487 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 [2021-11-20 07:13:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 07:13:07,571 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:13:07,571 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 [2021-11-20 07:13:07,581 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 [2021-11-20 07:13:08,199 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:13:08,200 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 76 [2021-11-20 07:13:08,202 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 70 treesize of output 58 [2021-11-20 07:13:08,422 INFO L354 Elim1Store]: treesize reduction 77, result has 26.7 percent of original size [2021-11-20 07:13:08,422 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 54 [2021-11-20 07:13:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:13:08,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:08,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83857410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:08,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:13:08,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 30 [2021-11-20 07:13:08,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567229460] [2021-11-20 07:13:08,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:13:08,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:13:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=981, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:13:08,739 INFO L87 Difference]: Start difference. First operand 230 states and 268 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:10,145 INFO L93 Difference]: Finished difference Result 359 states and 409 transitions. [2021-11-20 07:13:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:13:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-11-20 07:13:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:10,158 INFO L225 Difference]: With dead ends: 359 [2021-11-20 07:13:10,158 INFO L226 Difference]: Without dead ends: 359 [2021-11-20 07:13:10,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:13:10,160 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 413 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:10,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 2028 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1038 Invalid, 0 Unknown, 138 Unchecked, 0.6s Time] [2021-11-20 07:13:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-20 07:13:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 230. [2021-11-20 07:13:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 200 states have (on average 1.235) internal successors, (247), 214 states have internal predecessors, (247), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (14), 10 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 07:13:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2021-11-20 07:13:10,170 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 56 [2021-11-20 07:13:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:10,170 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2021-11-20 07:13:10,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2021-11-20 07:13:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:13:10,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:10,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:10,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:10,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 07:13:10,388 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1373705489, now seen corresponding path program 2 times [2021-11-20 07:13:10,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098521051] [2021-11-20 07:13:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:10,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:11,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:13:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:13:11,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098521051] [2021-11-20 07:13:11,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098521051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714147249] [2021-11-20 07:13:11,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:13:11,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:11,056 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:11,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:13:11,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:13:11,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:11,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:13:11,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:11,191 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 [2021-11-20 07:13:11,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:13:11,252 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 [2021-11-20 07:13:11,302 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:13:11,302 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 [2021-11-20 07:13:11,394 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:13:11,394 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 45 [2021-11-20 07:13:11,408 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:13:11,408 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 51 treesize of output 50 [2021-11-20 07:13:11,549 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 [2021-11-20 07:13:11,582 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-20 07:13:11,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 07:13:11,732 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 07:13:11,732 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 65 [2021-11-20 07:13:11,753 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-20 07:13:11,753 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2021-11-20 07:13:12,887 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 154 treesize of output 142 [2021-11-20 07:13:13,747 INFO L354 Elim1Store]: treesize reduction 193, result has 18.6 percent of original size [2021-11-20 07:13:13,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 209 treesize of output 133 [2021-11-20 07:13:13,791 INFO L354 Elim1Store]: treesize reduction 147, result has 6.4 percent of original size [2021-11-20 07:13:13,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 79 [2021-11-20 07:13:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:13:13,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:14,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714147249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:14,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:13:14,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 41 [2021-11-20 07:13:14,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711732476] [2021-11-20 07:13:14,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:14,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 07:13:14,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 07:13:14,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2132, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:13:14,600 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:16,808 INFO L93 Difference]: Finished difference Result 362 states and 410 transitions. [2021-11-20 07:13:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:13:16,809 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-11-20 07:13:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:16,810 INFO L225 Difference]: With dead ends: 362 [2021-11-20 07:13:16,810 INFO L226 Difference]: Without dead ends: 362 [2021-11-20 07:13:16,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=258, Invalid=3902, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 07:13:16,812 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 242 mSDsluCounter, 2240 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:16,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 2335 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1364 Invalid, 0 Unknown, 86 Unchecked, 0.9s Time] [2021-11-20 07:13:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-20 07:13:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 265. [2021-11-20 07:13:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 232 states have (on average 1.2241379310344827) internal successors, (284), 247 states have internal predecessors, (284), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (16), 11 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 07:13:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 307 transitions. [2021-11-20 07:13:16,821 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 307 transitions. Word has length 56 [2021-11-20 07:13:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:16,821 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 307 transitions. [2021-11-20 07:13:16,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 307 transitions. [2021-11-20 07:13:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:13:16,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:16,823 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:13:16,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:17,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 07:13:17,044 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:17,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash 370364452, now seen corresponding path program 1 times [2021-11-20 07:13:17,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:17,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218718958] [2021-11-20 07:13:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:17,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:17,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:17,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:13:17,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:17,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218718958] [2021-11-20 07:13:17,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218718958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:17,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670340887] [2021-11-20 07:13:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:17,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:17,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:17,324 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:17,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:13:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:17,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:13:17,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:17,444 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 [2021-11-20 07:13:17,474 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:13:17,474 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 [2021-11-20 07:13:17,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 07:13:17,523 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 16 treesize of output 12 [2021-11-20 07:13:17,929 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 35 treesize of output 23 [2021-11-20 07:13:18,349 INFO L354 Elim1Store]: treesize reduction 36, result has 47.8 percent of original size [2021-11-20 07:13:18,349 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 50 treesize of output 57 [2021-11-20 07:13:18,552 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:13:18,553 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 16 treesize of output 18 [2021-11-20 07:13:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:13:18,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:20,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:20,822 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 43 treesize of output 47 [2021-11-20 07:13:21,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670340887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:21,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:13:21,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 34 [2021-11-20 07:13:21,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583444874] [2021-11-20 07:13:21,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:21,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:13:21,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:13:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:13:21,883 INFO L87 Difference]: Start difference. First operand 265 states and 307 transitions. Second operand has 35 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 35 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:23,022 INFO L93 Difference]: Finished difference Result 286 states and 331 transitions. [2021-11-20 07:13:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:13:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 35 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2021-11-20 07:13:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:23,024 INFO L225 Difference]: With dead ends: 286 [2021-11-20 07:13:23,024 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 07:13:23,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=281, Invalid=3625, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 07:13:23,027 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 82 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:23,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1463 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 598 Invalid, 0 Unknown, 379 Unchecked, 0.3s Time] [2021-11-20 07:13:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 07:13:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 275. [2021-11-20 07:13:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 242 states have (on average 1.2231404958677685) internal successors, (296), 257 states have internal predecessors, (296), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (16), 11 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 07:13:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 319 transitions. [2021-11-20 07:13:23,036 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 319 transitions. Word has length 57 [2021-11-20 07:13:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:23,036 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 319 transitions. [2021-11-20 07:13:23,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 35 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 319 transitions. [2021-11-20 07:13:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:13:23,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:23,039 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:13:23,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:23,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:23,257 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash 370364453, now seen corresponding path program 1 times [2021-11-20 07:13:23,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:23,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223171815] [2021-11-20 07:13:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:23,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:23,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:23,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:13:23,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223171815] [2021-11-20 07:13:23,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223171815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104906614] [2021-11-20 07:13:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:23,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:23,545 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:23,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:13:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:13:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:23,668 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 [2021-11-20 07:13:23,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:13:24,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:24,597 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 70 treesize of output 73 [2021-11-20 07:13:24,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:24,605 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-11-20 07:13:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:13:24,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:26,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104906614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:26,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:13:26,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2021-11-20 07:13:26,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766009605] [2021-11-20 07:13:26,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:26,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:13:26,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:13:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2015, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 07:13:26,138 INFO L87 Difference]: Start difference. First operand 275 states and 319 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 35 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:26,989 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2021-11-20 07:13:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:13:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 35 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2021-11-20 07:13:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:26,991 INFO L225 Difference]: With dead ends: 286 [2021-11-20 07:13:26,991 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 07:13:26,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=303, Invalid=3479, Unknown=0, NotChecked=0, Total=3782 [2021-11-20 07:13:26,992 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 78 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:26,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1427 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 423 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2021-11-20 07:13:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 07:13:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 275. [2021-11-20 07:13:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 242 states have (on average 1.21900826446281) internal successors, (295), 257 states have internal predecessors, (295), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (16), 11 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 07:13:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 318 transitions. [2021-11-20 07:13:27,000 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 318 transitions. Word has length 57 [2021-11-20 07:13:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:27,001 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 318 transitions. [2021-11-20 07:13:27,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 35 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:13:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 318 transitions. [2021-11-20 07:13:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:13:27,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:27,003 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:13:27,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:27,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-20 07:13:27,228 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1403605247, now seen corresponding path program 1 times [2021-11-20 07:13:27,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101284357] [2021-11-20 07:13:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:27,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:27,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:27,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101284357] [2021-11-20 07:13:27,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101284357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:27,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039796491] [2021-11-20 07:13:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:27,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:27,365 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:27,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:13:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:13:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:27,513 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 16 treesize of output 12 [2021-11-20 07:13:27,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:27,892 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 24 treesize of output 43 [2021-11-20 07:13:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:13:27,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:28,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:28,419 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 121 treesize of output 131 [2021-11-20 07:13:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039796491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:28,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:28,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 15] total 31 [2021-11-20 07:13:28,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975430808] [2021-11-20 07:13:28,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:28,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:13:28,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:13:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:13:28,808 INFO L87 Difference]: Start difference. First operand 275 states and 318 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:13:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:29,486 INFO L93 Difference]: Finished difference Result 301 states and 341 transitions. [2021-11-20 07:13:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:13:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2021-11-20 07:13:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:29,489 INFO L225 Difference]: With dead ends: 301 [2021-11-20 07:13:29,490 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 07:13:29,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=1935, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 07:13:29,491 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 94 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:29,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1552 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 564 Invalid, 0 Unknown, 222 Unchecked, 0.3s Time] [2021-11-20 07:13:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 07:13:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 277. [2021-11-20 07:13:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 244 states have (on average 1.2131147540983607) internal successors, (296), 259 states have internal predecessors, (296), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (16), 11 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 07:13:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 319 transitions. [2021-11-20 07:13:29,499 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 319 transitions. Word has length 58 [2021-11-20 07:13:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:29,499 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 319 transitions. [2021-11-20 07:13:29,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:13:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 319 transitions. [2021-11-20 07:13:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 07:13:29,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:29,501 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:13:29,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-20 07:13:29,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-20 07:13:29,715 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash -562042908, now seen corresponding path program 1 times [2021-11-20 07:13:29,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:29,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120332049] [2021-11-20 07:13:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:29,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:29,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:29,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:29,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120332049] [2021-11-20 07:13:29,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120332049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872107300] [2021-11-20 07:13:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:29,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:29,845 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:29,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:13:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:13:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:29,968 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 [2021-11-20 07:13:30,151 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 19 treesize of output 11 [2021-11-20 07:13:30,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:30,196 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 07:13:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:13:30,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:30,424 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 20 treesize of output 12 [2021-11-20 07:13:30,436 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 10 treesize of output 8 [2021-11-20 07:13:30,438 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 18 treesize of output 16 [2021-11-20 07:13:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:30,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872107300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:30,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:30,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 25 [2021-11-20 07:13:30,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106529004] [2021-11-20 07:13:30,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:30,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:13:30,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:13:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:13:30,475 INFO L87 Difference]: Start difference. First operand 277 states and 319 transitions. Second operand has 26 states, 25 states have (on average 3.28) internal successors, (82), 26 states have internal predecessors, (82), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:13:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:31,088 INFO L93 Difference]: Finished difference Result 308 states and 349 transitions. [2021-11-20 07:13:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:13:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.28) internal successors, (82), 26 states have internal predecessors, (82), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-11-20 07:13:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:31,089 INFO L225 Difference]: With dead ends: 308 [2021-11-20 07:13:31,090 INFO L226 Difference]: Without dead ends: 308 [2021-11-20 07:13:31,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:13:31,090 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 186 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:31,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1431 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 609 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2021-11-20 07:13:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-20 07:13:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 280. [2021-11-20 07:13:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 247 states have (on average 1.2186234817813766) internal successors, (301), 262 states have internal predecessors, (301), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (16), 11 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 07:13:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 324 transitions. [2021-11-20 07:13:31,098 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 324 transitions. Word has length 59 [2021-11-20 07:13:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:31,099 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 324 transitions. [2021-11-20 07:13:31,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.28) internal successors, (82), 26 states have internal predecessors, (82), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:13:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 324 transitions. [2021-11-20 07:13:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 07:13:31,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:31,100 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:31,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:31,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:31,324 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1610299348, now seen corresponding path program 3 times [2021-11-20 07:13:31,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:31,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075608340] [2021-11-20 07:13:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:31,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:31,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:31,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:13:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:13:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075608340] [2021-11-20 07:13:31,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075608340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585787491] [2021-11-20 07:13:31,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:13:31,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:31,603 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:31,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:13:31,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:13:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:31,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 07:13:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:13:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:13:32,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585787491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:32,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:32,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 36 [2021-11-20 07:13:32,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604807895] [2021-11-20 07:13:32,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:32,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:13:32,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:13:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:13:32,673 INFO L87 Difference]: Start difference. First operand 280 states and 324 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 33 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:13:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:33,291 INFO L93 Difference]: Finished difference Result 510 states and 594 transitions. [2021-11-20 07:13:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:13:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 33 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-11-20 07:13:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:33,294 INFO L225 Difference]: With dead ends: 510 [2021-11-20 07:13:33,294 INFO L226 Difference]: Without dead ends: 510 [2021-11-20 07:13:33,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:13:33,295 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 299 mSDsluCounter, 2562 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:33,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 2701 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:13:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-20 07:13:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 345. [2021-11-20 07:13:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 309 states have (on average 1.1877022653721683) internal successors, (367), 324 states have internal predecessors, (367), 9 states have call successors, (9), 6 states have call predecessors, (9), 14 states have return successors, (20), 14 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:13:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 396 transitions. [2021-11-20 07:13:33,305 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 396 transitions. Word has length 59 [2021-11-20 07:13:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:33,306 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 396 transitions. [2021-11-20 07:13:33,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 33 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:13:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 396 transitions. [2021-11-20 07:13:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:13:33,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:33,307 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 07:13:33,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:33,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:33,532 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -243460766, now seen corresponding path program 1 times [2021-11-20 07:13:33,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281280018] [2021-11-20 07:13:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:33,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:33,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:33,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:33,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281280018] [2021-11-20 07:13:33,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281280018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521079147] [2021-11-20 07:13:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:33,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:33,674 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:33,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:13:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:13:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:33,829 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 17 treesize of output 13 [2021-11-20 07:13:34,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:34,313 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 25 treesize of output 44 [2021-11-20 07:13:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:13:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:34,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:13:34,976 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 144 treesize of output 154 [2021-11-20 07:13:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:35,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521079147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:35,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:35,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 30 [2021-11-20 07:13:35,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876807514] [2021-11-20 07:13:35,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:35,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:13:35,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:13:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:13:35,169 INFO L87 Difference]: Start difference. First operand 345 states and 396 transitions. Second operand has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:13:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:35,955 INFO L93 Difference]: Finished difference Result 363 states and 410 transitions. [2021-11-20 07:13:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:13:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-11-20 07:13:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:35,961 INFO L225 Difference]: With dead ends: 363 [2021-11-20 07:13:35,962 INFO L226 Difference]: Without dead ends: 363 [2021-11-20 07:13:35,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 07:13:35,964 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 94 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:35,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1450 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 605 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2021-11-20 07:13:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-20 07:13:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 346. [2021-11-20 07:13:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 310 states have (on average 1.1870967741935483) internal successors, (368), 325 states have internal predecessors, (368), 9 states have call successors, (9), 6 states have call predecessors, (9), 14 states have return successors, (20), 14 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:13:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 397 transitions. [2021-11-20 07:13:35,973 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 397 transitions. Word has length 60 [2021-11-20 07:13:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:35,974 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 397 transitions. [2021-11-20 07:13:35,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:13:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 397 transitions. [2021-11-20 07:13:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 07:13:35,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:35,976 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:36,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:36,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:36,198 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1745492210, now seen corresponding path program 1 times [2021-11-20 07:13:36,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:36,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518053267] [2021-11-20 07:13:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:36,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:36,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:36,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:13:36,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518053267] [2021-11-20 07:13:36,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518053267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783975030] [2021-11-20 07:13:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:36,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:36,296 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:36,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:13:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:13:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:13:36,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:13:36,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783975030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:36,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-20 07:13:36,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596720909] [2021-11-20 07:13:36,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:36,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:13:36,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:13:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:13:36,759 INFO L87 Difference]: Start difference. First operand 346 states and 397 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:13:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:36,923 INFO L93 Difference]: Finished difference Result 433 states and 502 transitions. [2021-11-20 07:13:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:13:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2021-11-20 07:13:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:36,925 INFO L225 Difference]: With dead ends: 433 [2021-11-20 07:13:36,925 INFO L226 Difference]: Without dead ends: 433 [2021-11-20 07:13:36,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:13:36,926 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 103 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:36,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 714 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-20 07:13:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 377. [2021-11-20 07:13:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 339 states have (on average 1.1976401179941003) internal successors, (406), 354 states have internal predecessors, (406), 9 states have call successors, (9), 6 states have call predecessors, (9), 16 states have return successors, (22), 16 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:13:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 437 transitions. [2021-11-20 07:13:36,935 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 437 transitions. Word has length 61 [2021-11-20 07:13:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:36,943 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 437 transitions. [2021-11-20 07:13:36,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:13:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 437 transitions. [2021-11-20 07:13:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:13:36,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:36,945 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:36,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:37,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 07:13:37,166 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash 675015856, now seen corresponding path program 1 times [2021-11-20 07:13:37,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:37,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180907205] [2021-11-20 07:13:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:37,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:13:37,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180907205] [2021-11-20 07:13:37,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180907205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:37,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:37,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:13:37,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671427469] [2021-11-20 07:13:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:37,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:13:37,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:13:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:13:37,244 INFO L87 Difference]: Start difference. First operand 377 states and 437 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:37,439 INFO L93 Difference]: Finished difference Result 486 states and 560 transitions. [2021-11-20 07:13:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:13:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2021-11-20 07:13:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:37,441 INFO L225 Difference]: With dead ends: 486 [2021-11-20 07:13:37,442 INFO L226 Difference]: Without dead ends: 486 [2021-11-20 07:13:37,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:13:37,442 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 284 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:37,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 375 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-20 07:13:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 383. [2021-11-20 07:13:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 345 states have (on average 1.2028985507246377) internal successors, (415), 360 states have internal predecessors, (415), 9 states have call successors, (9), 6 states have call predecessors, (9), 16 states have return successors, (22), 16 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:13:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 446 transitions. [2021-11-20 07:13:37,452 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 446 transitions. Word has length 62 [2021-11-20 07:13:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:37,453 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 446 transitions. [2021-11-20 07:13:37,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 446 transitions. [2021-11-20 07:13:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:13:37,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:37,455 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-20 07:13:37,455 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 675015857, now seen corresponding path program 1 times [2021-11-20 07:13:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038748350] [2021-11-20 07:13:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:37,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:13:37,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:37,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038748350] [2021-11-20 07:13:37,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038748350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:37,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:37,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:13:37,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255829855] [2021-11-20 07:13:37,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:37,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:13:37,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:13:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:13:37,546 INFO L87 Difference]: Start difference. First operand 383 states and 446 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:37,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:37,756 INFO L93 Difference]: Finished difference Result 477 states and 549 transitions. [2021-11-20 07:13:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:13:37,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2021-11-20 07:13:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:37,758 INFO L225 Difference]: With dead ends: 477 [2021-11-20 07:13:37,758 INFO L226 Difference]: Without dead ends: 477 [2021-11-20 07:13:37,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:13:37,759 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 191 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:37,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 369 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-20 07:13:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 383. [2021-11-20 07:13:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 345 states have (on average 1.2) internal successors, (414), 360 states have internal predecessors, (414), 9 states have call successors, (9), 6 states have call predecessors, (9), 16 states have return successors, (22), 16 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:13:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 445 transitions. [2021-11-20 07:13:37,769 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 445 transitions. Word has length 62 [2021-11-20 07:13:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:37,769 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 445 transitions. [2021-11-20 07:13:37,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 445 transitions. [2021-11-20 07:13:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 07:13:37,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:37,771 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:37,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-20 07:13:37,772 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash -790633172, now seen corresponding path program 3 times [2021-11-20 07:13:37,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939790328] [2021-11-20 07:13:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:37,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:13:37,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:37,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939790328] [2021-11-20 07:13:37,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939790328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:37,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596955411] [2021-11-20 07:13:37,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:13:37,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:37,876 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:37,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:13:37,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:13:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:13:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:13:38,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:13:38,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596955411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:38,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:38,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 07:13:38,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199693665] [2021-11-20 07:13:38,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:38,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:13:38,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:13:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:13:38,355 INFO L87 Difference]: Start difference. First operand 383 states and 445 transitions. Second operand has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:13:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:38,564 INFO L93 Difference]: Finished difference Result 485 states and 570 transitions. [2021-11-20 07:13:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:13:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-20 07:13:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:38,569 INFO L225 Difference]: With dead ends: 485 [2021-11-20 07:13:38,569 INFO L226 Difference]: Without dead ends: 485 [2021-11-20 07:13:38,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:13:38,570 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 86 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:38,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 785 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-20 07:13:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 361. [2021-11-20 07:13:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 324 states have (on average 1.2037037037037037) internal successors, (390), 339 states have internal predecessors, (390), 8 states have call successors, (8), 6 states have call predecessors, (8), 16 states have return successors, (20), 15 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 07:13:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 418 transitions. [2021-11-20 07:13:38,585 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 418 transitions. Word has length 61 [2021-11-20 07:13:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:38,585 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 418 transitions. [2021-11-20 07:13:38,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:13:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 418 transitions. [2021-11-20 07:13:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:13:38,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:38,587 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:38,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:38,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 07:13:38,807 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1914147543, now seen corresponding path program 1 times [2021-11-20 07:13:38,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:38,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863778505] [2021-11-20 07:13:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:38,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:38,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 07:13:38,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:38,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863778505] [2021-11-20 07:13:38,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863778505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:38,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:13:38,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:13:38,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785188110] [2021-11-20 07:13:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:38,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:13:38,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:13:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:13:38,849 INFO L87 Difference]: Start difference. First operand 361 states and 418 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:38,909 INFO L93 Difference]: Finished difference Result 394 states and 458 transitions. [2021-11-20 07:13:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:13:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2021-11-20 07:13:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:38,912 INFO L225 Difference]: With dead ends: 394 [2021-11-20 07:13:38,912 INFO L226 Difference]: Without dead ends: 394 [2021-11-20 07:13:38,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:13:38,912 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 35 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:38,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 216 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-20 07:13:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 360. [2021-11-20 07:13:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 324 states have (on average 1.2006172839506173) internal successors, (389), 338 states have internal predecessors, (389), 8 states have call successors, (8), 6 states have call predecessors, (8), 16 states have return successors, (20), 15 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 07:13:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 417 transitions. [2021-11-20 07:13:38,920 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 417 transitions. Word has length 63 [2021-11-20 07:13:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:38,921 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 417 transitions. [2021-11-20 07:13:38,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 417 transitions. [2021-11-20 07:13:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:13:38,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:38,923 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:38,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-20 07:13:38,923 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1914147544, now seen corresponding path program 1 times [2021-11-20 07:13:38,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:38,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106803560] [2021-11-20 07:13:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:38,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:13:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:13:39,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106803560] [2021-11-20 07:13:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106803560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909960339] [2021-11-20 07:13:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:39,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:39,037 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:39,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:13:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:13:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 07:13:39,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:13:39,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909960339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:13:39,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:13:39,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-20 07:13:39,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736924713] [2021-11-20 07:13:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:13:39,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:13:39,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:13:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:13:39,279 INFO L87 Difference]: Start difference. First operand 360 states and 417 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:39,353 INFO L93 Difference]: Finished difference Result 395 states and 458 transitions. [2021-11-20 07:13:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:13:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2021-11-20 07:13:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:39,356 INFO L225 Difference]: With dead ends: 395 [2021-11-20 07:13:39,356 INFO L226 Difference]: Without dead ends: 395 [2021-11-20 07:13:39,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:13:39,356 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 37 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:39,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 242 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:13:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-20 07:13:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 359. [2021-11-20 07:13:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 324 states have (on average 1.1975308641975309) internal successors, (388), 337 states have internal predecessors, (388), 8 states have call successors, (8), 6 states have call predecessors, (8), 16 states have return successors, (20), 15 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 07:13:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 416 transitions. [2021-11-20 07:13:39,364 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 416 transitions. Word has length 63 [2021-11-20 07:13:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:39,365 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 416 transitions. [2021-11-20 07:13:39,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:13:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 416 transitions. [2021-11-20 07:13:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:13:39,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:39,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:39,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:39,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-20 07:13:39,580 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1248499962, now seen corresponding path program 4 times [2021-11-20 07:13:39,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:39,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694912694] [2021-11-20 07:13:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:39,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:13:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:13:39,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694912694] [2021-11-20 07:13:39,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694912694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494250576] [2021-11-20 07:13:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:13:39,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:39,701 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:39,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:13:39,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:13:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:13:39,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:13:39,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:13:40,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494250576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:40,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:13:40,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2021-11-20 07:13:40,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456091197] [2021-11-20 07:13:40,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:40,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:13:40,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:13:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:13:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:13:40,185 INFO L87 Difference]: Start difference. First operand 359 states and 416 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:13:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:40,437 INFO L93 Difference]: Finished difference Result 354 states and 412 transitions. [2021-11-20 07:13:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:13:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-20 07:13:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:40,439 INFO L225 Difference]: With dead ends: 354 [2021-11-20 07:13:40,439 INFO L226 Difference]: Without dead ends: 354 [2021-11-20 07:13:40,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:13:40,440 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 31 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:40,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 768 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:13:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-20 07:13:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 342. [2021-11-20 07:13:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 308 states have (on average 1.2045454545454546) internal successors, (371), 321 states have internal predecessors, (371), 7 states have call successors, (7), 6 states have call predecessors, (7), 16 states have return successors, (18), 14 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 07:13:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 396 transitions. [2021-11-20 07:13:40,447 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 396 transitions. Word has length 62 [2021-11-20 07:13:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:40,448 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 396 transitions. [2021-11-20 07:13:40,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:13:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 396 transitions. [2021-11-20 07:13:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:13:40,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:40,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:13:40,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:40,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-20 07:13:40,664 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:13:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1260281321, now seen corresponding path program 2 times [2021-11-20 07:13:40,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:40,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637499725] [2021-11-20 07:13:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:40,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:40,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:13:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:40,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:13:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:13:40,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:13:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637499725] [2021-11-20 07:13:40,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637499725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:13:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174739101] [2021-11-20 07:13:40,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:13:40,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:40,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:40,922 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:40,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:13:40,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:13:40,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:13:40,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:41,014 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 [2021-11-20 07:13:41,239 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 46 treesize of output 34 [2021-11-20 07:13:42,583 INFO L354 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2021-11-20 07:13:42,584 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 100 treesize of output 102 [2021-11-20 07:13:42,609 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-11-20 07:13:42,609 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 81 treesize of output 70 [2021-11-20 07:13:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:13:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:46,234 INFO L354 Elim1Store]: treesize reduction 30, result has 73.9 percent of original size [2021-11-20 07:13:46,234 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 118 treesize of output 150 [2021-11-20 07:14:50,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174739101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:50,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:50,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24] total 37 [2021-11-20 07:14:50,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031913702] [2021-11-20 07:14:50,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:50,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 07:14:50,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 07:14:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2609, Unknown=1, NotChecked=0, Total=2756 [2021-11-20 07:14:50,435 INFO L87 Difference]: Start difference. First operand 342 states and 396 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:14:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:52,253 INFO L93 Difference]: Finished difference Result 393 states and 449 transitions. [2021-11-20 07:14:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 07:14:52,254 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2021-11-20 07:14:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:52,256 INFO L225 Difference]: With dead ends: 393 [2021-11-20 07:14:52,256 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 07:14:52,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=284, Invalid=4827, Unknown=1, NotChecked=0, Total=5112 [2021-11-20 07:14:52,257 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 74 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:52,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 2027 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 736 Invalid, 0 Unknown, 528 Unchecked, 0.5s Time] [2021-11-20 07:14:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 07:14:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 370. [2021-11-20 07:14:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 336 states have (on average 1.2410714285714286) internal successors, (417), 349 states have internal predecessors, (417), 7 states have call successors, (7), 6 states have call predecessors, (7), 16 states have return successors, (18), 14 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 07:14:52,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 442 transitions. [2021-11-20 07:14:52,268 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 442 transitions. Word has length 63 [2021-11-20 07:14:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:52,269 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 442 transitions. [2021-11-20 07:14:52,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:14:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 442 transitions. [2021-11-20 07:14:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:14:52,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:52,271 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:14:52,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:52,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:52,488 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:14:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 414013916, now seen corresponding path program 2 times [2021-11-20 07:14:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:52,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010919624] [2021-11-20 07:14:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:52,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:53,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:14:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:53,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:14:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:14:53,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010919624] [2021-11-20 07:14:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010919624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:14:53,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377164361] [2021-11-20 07:14:53,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:14:53,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:14:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:53,580 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:14:53,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:14:53,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:14:53,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:14:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:14:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:53,989 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 43 treesize of output 39 [2021-11-20 07:14:54,321 INFO L354 Elim1Store]: treesize reduction 152, result has 11.1 percent of original size [2021-11-20 07:14:54,322 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 7 case distinctions, treesize of input 88 treesize of output 73 [2021-11-20 07:14:59,447 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-20 07:14:59,448 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 78 treesize of output 49 [2021-11-20 07:15:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:15:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377164361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:01,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:01,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2021-11-20 07:15:01,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729439989] [2021-11-20 07:15:01,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:01,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:15:01,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:15:01,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1692, Unknown=3, NotChecked=0, Total=1806 [2021-11-20 07:15:01,541 INFO L87 Difference]: Start difference. First operand 370 states and 442 transitions. Second operand has 36 states, 35 states have (on average 2.857142857142857) internal successors, (100), 36 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:09,526 INFO L93 Difference]: Finished difference Result 376 states and 447 transitions. [2021-11-20 07:15:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:15:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.857142857142857) internal successors, (100), 36 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 64 [2021-11-20 07:15:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:09,533 INFO L225 Difference]: With dead ends: 376 [2021-11-20 07:15:09,533 INFO L226 Difference]: Without dead ends: 341 [2021-11-20 07:15:09,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=207, Invalid=2867, Unknown=6, NotChecked=0, Total=3080 [2021-11-20 07:15:09,534 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 46 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:09,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1584 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 815 Invalid, 0 Unknown, 302 Unchecked, 0.7s Time] [2021-11-20 07:15:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-20 07:15:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 339. [2021-11-20 07:15:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 306 states have (on average 1.2581699346405228) internal successors, (385), 319 states have internal predecessors, (385), 7 states have call successors, (7), 6 states have call predecessors, (7), 15 states have return successors, (17), 13 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-20 07:15:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 409 transitions. [2021-11-20 07:15:09,539 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 409 transitions. Word has length 64 [2021-11-20 07:15:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:09,539 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 409 transitions. [2021-11-20 07:15:09,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.857142857142857) internal successors, (100), 36 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 409 transitions. [2021-11-20 07:15:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:15:09,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:09,541 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:09,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:09,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:09,761 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:15:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:09,762 INFO L85 PathProgramCache]: Analyzing trace with hash 358959061, now seen corresponding path program 1 times [2021-11-20 07:15:09,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:09,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103138055] [2021-11-20 07:15:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:09,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:09,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:15:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:15:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:09,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:15:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:15:09,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:09,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103138055] [2021-11-20 07:15:09,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103138055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:09,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:09,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:15:09,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427763467] [2021-11-20 07:15:09,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:09,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:15:09,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:09,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:15:09,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:15:09,827 INFO L87 Difference]: Start difference. First operand 339 states and 409 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:15:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:09,964 INFO L93 Difference]: Finished difference Result 435 states and 529 transitions. [2021-11-20 07:15:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:15:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2021-11-20 07:15:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:09,967 INFO L225 Difference]: With dead ends: 435 [2021-11-20 07:15:09,967 INFO L226 Difference]: Without dead ends: 435 [2021-11-20 07:15:09,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:15:09,967 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 129 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:09,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 405 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-20 07:15:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 339. [2021-11-20 07:15:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 306 states have (on average 1.2549019607843137) internal successors, (384), 319 states have internal predecessors, (384), 7 states have call successors, (7), 6 states have call predecessors, (7), 15 states have return successors, (17), 13 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-20 07:15:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 408 transitions. [2021-11-20 07:15:09,982 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 408 transitions. Word has length 65 [2021-11-20 07:15:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:09,982 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 408 transitions. [2021-11-20 07:15:09,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:15:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 408 transitions. [2021-11-20 07:15:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:15:09,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:09,985 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:09,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-20 07:15:09,986 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:15:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash 360591355, now seen corresponding path program 1 times [2021-11-20 07:15:09,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:09,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2765056] [2021-11-20 07:15:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:09,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:15:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:15:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:15:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:15:10,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2765056] [2021-11-20 07:15:10,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2765056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231486786] [2021-11-20 07:15:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:10,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:10,437 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:10,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 07:15:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:15:10,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:10,567 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 [2021-11-20 07:15:10,769 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:15:10,770 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 16 treesize of output 18 [2021-11-20 07:15:10,996 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:15:10,996 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 20 [2021-11-20 07:15:11,080 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 [2021-11-20 07:15:11,104 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 07:15:11,105 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 32 [2021-11-20 07:15:11,189 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 44 treesize of output 36 [2021-11-20 07:15:11,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:15:11,299 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 34 treesize of output 25 [2021-11-20 07:15:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:15:11,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:11,441 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 80 treesize of output 76 [2021-11-20 07:15:17,519 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:15:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231486786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:19,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-11-20 07:15:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096633467] [2021-11-20 07:15:19,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:15:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:15:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=871, Unknown=1, NotChecked=0, Total=992 [2021-11-20 07:15:19,320 INFO L87 Difference]: Start difference. First operand 339 states and 408 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:15:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:20,147 INFO L93 Difference]: Finished difference Result 527 states and 646 transitions. [2021-11-20 07:15:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:15:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-20 07:15:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:20,150 INFO L225 Difference]: With dead ends: 527 [2021-11-20 07:15:20,150 INFO L226 Difference]: Without dead ends: 527 [2021-11-20 07:15:20,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=256, Invalid=1635, Unknown=1, NotChecked=0, Total=1892 [2021-11-20 07:15:20,151 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 201 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:20,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1059 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 665 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2021-11-20 07:15:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-20 07:15:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 394. [2021-11-20 07:15:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 357 states have (on average 1.2633053221288515) internal successors, (451), 370 states have internal predecessors, (451), 8 states have call successors, (8), 7 states have call predecessors, (8), 18 states have return successors, (20), 16 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 07:15:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 479 transitions. [2021-11-20 07:15:20,160 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 479 transitions. Word has length 65 [2021-11-20 07:15:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:20,161 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 479 transitions. [2021-11-20 07:15:20,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:15:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 479 transitions. [2021-11-20 07:15:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:15:20,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:20,163 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:20,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:20,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:20,375 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:15:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 360591356, now seen corresponding path program 1 times [2021-11-20 07:15:20,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:20,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181337546] [2021-11-20 07:15:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:20,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:15:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:20,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:15:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:15:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:15:20,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181337546] [2021-11-20 07:15:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181337546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053142278] [2021-11-20 07:15:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:20,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:20,856 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:20,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 07:15:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:15:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:21,066 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 [2021-11-20 07:15:21,071 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 [2021-11-20 07:15:21,720 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:15:21,720 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 15 treesize of output 15 [2021-11-20 07:15:21,737 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 16 treesize of output 18 [2021-11-20 07:15:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:15:22,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-20 07:15:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:15:22,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2021-11-20 07:15:22,222 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:15:22,222 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 62 [2021-11-20 07:15:22,233 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-20 07:15:22,233 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 72 [2021-11-20 07:15:22,544 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 07:15:22,544 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 96 treesize of output 54 [2021-11-20 07:15:22,553 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-20 07:15:22,553 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 45 treesize of output 35 [2021-11-20 07:15:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:15:22,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:49,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053142278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:49,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:49,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-11-20 07:15:49,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678047800] [2021-11-20 07:15:49,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:49,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:15:49,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:15:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1562, Unknown=11, NotChecked=0, Total=1722 [2021-11-20 07:15:49,832 INFO L87 Difference]: Start difference. First operand 394 states and 479 transitions. Second operand has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 32 states have internal predecessors, (88), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:15:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:52,185 INFO L93 Difference]: Finished difference Result 607 states and 738 transitions. [2021-11-20 07:15:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:15:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 32 states have internal predecessors, (88), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2021-11-20 07:15:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:52,189 INFO L225 Difference]: With dead ends: 607 [2021-11-20 07:15:52,189 INFO L226 Difference]: Without dead ends: 607 [2021-11-20 07:15:52,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=437, Invalid=3334, Unknown=11, NotChecked=0, Total=3782 [2021-11-20 07:15:52,190 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 333 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:52,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1208 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 923 Invalid, 0 Unknown, 190 Unchecked, 0.9s Time] [2021-11-20 07:15:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-20 07:15:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 489. [2021-11-20 07:15:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 450 states have (on average 1.2622222222222221) internal successors, (568), 459 states have internal predecessors, (568), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:15:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 604 transitions. [2021-11-20 07:15:52,202 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 604 transitions. Word has length 65 [2021-11-20 07:15:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:52,202 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 604 transitions. [2021-11-20 07:15:52,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 32 states have internal predecessors, (88), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:15:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 604 transitions. [2021-11-20 07:15:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:15:52,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:52,204 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:52,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:52,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-20 07:15:52,432 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:15:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 682299358, now seen corresponding path program 4 times [2021-11-20 07:15:52,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:52,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774010741] [2021-11-20 07:15:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:52,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:53,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:15:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:15:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:15:53,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774010741] [2021-11-20 07:15:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774010741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912156251] [2021-11-20 07:15:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:15:53,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:53,205 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:53,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 07:15:53,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:15:53,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:15:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 07:15:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:53,301 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 [2021-11-20 07:15:53,327 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:15:53,327 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 [2021-11-20 07:15:53,385 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 17 treesize of output 13 [2021-11-20 07:15:53,446 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-20 07:15:53,446 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 41 [2021-11-20 07:15:53,546 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 [2021-11-20 07:15:53,560 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:15:53,560 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 38 treesize of output 33 [2021-11-20 07:15:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:15:53,774 INFO L354 Elim1Store]: treesize reduction 110, result has 32.1 percent of original size [2021-11-20 07:15:53,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 69 [2021-11-20 07:15:53,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-20 07:15:53,964 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 07:15:53,964 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 74 [2021-11-20 07:15:53,976 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:15:53,977 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 118 treesize of output 117 [2021-11-20 07:15:55,257 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 184 treesize of output 172 [2021-11-20 07:15:55,741 INFO L354 Elim1Store]: treesize reduction 122, result has 5.4 percent of original size [2021-11-20 07:15:55,741 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 204 treesize of output 165 [2021-11-20 07:15:56,218 INFO L354 Elim1Store]: treesize reduction 160, result has 23.4 percent of original size [2021-11-20 07:15:56,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 155 treesize of output 106 [2021-11-20 07:15:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:15:56,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:57,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912156251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:57,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:57,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-11-20 07:15:57,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984788162] [2021-11-20 07:15:57,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 07:15:57,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 07:15:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:15:57,227 INFO L87 Difference]: Start difference. First operand 489 states and 604 transitions. Second operand has 41 states, 40 states have (on average 2.15) internal successors, (86), 41 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:02,169 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2021-11-20 07:16:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:16:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.15) internal successors, (86), 41 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 64 [2021-11-20 07:16:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:02,172 INFO L225 Difference]: With dead ends: 770 [2021-11-20 07:16:02,172 INFO L226 Difference]: Without dead ends: 770 [2021-11-20 07:16:02,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=387, Invalid=3394, Unknown=1, NotChecked=0, Total=3782 [2021-11-20 07:16:02,173 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 358 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:02,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 2050 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1240 Invalid, 0 Unknown, 297 Unchecked, 1.1s Time] [2021-11-20 07:16:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-20 07:16:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 492. [2021-11-20 07:16:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 453 states have (on average 1.2649006622516556) internal successors, (573), 462 states have internal predecessors, (573), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:16:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 609 transitions. [2021-11-20 07:16:02,184 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 609 transitions. Word has length 64 [2021-11-20 07:16:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:02,184 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 609 transitions. [2021-11-20 07:16:02,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.15) internal successors, (86), 41 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 609 transitions. [2021-11-20 07:16:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:16:02,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:02,186 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:02,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-20 07:16:02,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-20 07:16:02,392 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:16:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash 682299359, now seen corresponding path program 2 times [2021-11-20 07:16:02,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:02,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435427965] [2021-11-20 07:16:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:02,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:03,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:16:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:03,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:16:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:16:03,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:03,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435427965] [2021-11-20 07:16:03,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435427965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:03,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550531312] [2021-11-20 07:16:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:16:03,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:03,416 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 07:16:03,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:16:03,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:16:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 07:16:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:03,545 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 [2021-11-20 07:16:03,551 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 [2021-11-20 07:16:03,606 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:16:03,606 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 [2021-11-20 07:16:03,624 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:16:03,624 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 [2021-11-20 07:16:03,708 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 22 treesize of output 18 [2021-11-20 07:16:03,718 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 [2021-11-20 07:16:03,902 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-20 07:16:03,902 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 41 [2021-11-20 07:16:03,921 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:16:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:16:04,073 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:16:04,074 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 70 treesize of output 61 [2021-11-20 07:16:04,085 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:16:04,086 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 87 treesize of output 86 [2021-11-20 07:16:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:16:04,350 INFO L354 Elim1Store]: treesize reduction 98, result has 22.2 percent of original size [2021-11-20 07:16:04,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 42 [2021-11-20 07:16:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:16:04,389 INFO L354 Elim1Store]: treesize reduction 32, result has 43.9 percent of original size [2021-11-20 07:16:04,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 37 [2021-11-20 07:16:04,553 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 07:16:04,553 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 81 [2021-11-20 07:16:04,575 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-20 07:16:04,575 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 135 [2021-11-20 07:16:14,345 INFO L354 Elim1Store]: treesize reduction 188, result has 20.7 percent of original size [2021-11-20 07:16:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 266 treesize of output 159 [2021-11-20 07:16:14,392 INFO L354 Elim1Store]: treesize reduction 147, result has 6.4 percent of original size [2021-11-20 07:16:14,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 105 [2021-11-20 07:16:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 28 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:16:14,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:16:15,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550531312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:15,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:16:15,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-11-20 07:16:15,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090382113] [2021-11-20 07:16:15,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:16:15,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 07:16:15,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 07:16:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2570, Unknown=2, NotChecked=0, Total=2756 [2021-11-20 07:16:15,997 INFO L87 Difference]: Start difference. First operand 492 states and 609 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:28,404 INFO L93 Difference]: Finished difference Result 809 states and 1006 transitions. [2021-11-20 07:16:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:16:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 64 [2021-11-20 07:16:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:28,424 INFO L225 Difference]: With dead ends: 809 [2021-11-20 07:16:28,424 INFO L226 Difference]: Without dead ends: 809 [2021-11-20 07:16:28,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=493, Invalid=4331, Unknown=6, NotChecked=0, Total=4830 [2021-11-20 07:16:28,425 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 576 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:28,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 2431 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1644 Invalid, 0 Unknown, 220 Unchecked, 1.6s Time] [2021-11-20 07:16:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-11-20 07:16:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 492. [2021-11-20 07:16:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 453 states have (on average 1.2626931567328918) internal successors, (572), 462 states have internal predecessors, (572), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:16:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 608 transitions. [2021-11-20 07:16:28,437 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 608 transitions. Word has length 64 [2021-11-20 07:16:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:28,438 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 608 transitions. [2021-11-20 07:16:28,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 608 transitions. [2021-11-20 07:16:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:16:28,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:28,439 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:28,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:28,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-20 07:16:28,668 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:16:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash 662322346, now seen corresponding path program 1 times [2021-11-20 07:16:28,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:28,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834412841] [2021-11-20 07:16:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:28,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:16:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:16:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:16:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:16:29,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834412841] [2021-11-20 07:16:29,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834412841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103371978] [2021-11-20 07:16:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:29,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:29,100 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:29,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 07:16:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:16:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:33,755 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:16:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 19 [2021-11-20 07:16:33,872 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 07:16:33,872 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 30 [2021-11-20 07:16:33,889 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 [2021-11-20 07:16:33,984 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 42 treesize of output 34 [2021-11-20 07:16:34,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:16:34,146 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 32 treesize of output 23 [2021-11-20 07:16:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:16:34,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:16:34,297 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 78 treesize of output 74 [2021-11-20 07:16:45,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103371978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:45,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:16:45,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-20 07:16:45,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016077206] [2021-11-20 07:16:45,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:16:45,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:16:45,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:16:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=873, Unknown=6, NotChecked=0, Total=992 [2021-11-20 07:16:45,110 INFO L87 Difference]: Start difference. First operand 492 states and 608 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:16:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:45,873 INFO L93 Difference]: Finished difference Result 552 states and 680 transitions. [2021-11-20 07:16:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:16:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-11-20 07:16:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:45,875 INFO L225 Difference]: With dead ends: 552 [2021-11-20 07:16:45,875 INFO L226 Difference]: Without dead ends: 552 [2021-11-20 07:16:45,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=255, Invalid=1545, Unknown=6, NotChecked=0, Total=1806 [2021-11-20 07:16:45,876 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 176 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:45,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1015 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 425 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2021-11-20 07:16:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-20 07:16:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 492. [2021-11-20 07:16:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 453 states have (on average 1.2582781456953642) internal successors, (570), 462 states have internal predecessors, (570), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:16:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 606 transitions. [2021-11-20 07:16:45,882 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 606 transitions. Word has length 68 [2021-11-20 07:16:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:45,883 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 606 transitions. [2021-11-20 07:16:45,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:16:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 606 transitions. [2021-11-20 07:16:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:16:45,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:45,884 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:45,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-20 07:16:46,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:46,095 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:16:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 663954640, now seen corresponding path program 2 times [2021-11-20 07:16:46,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:46,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639688982] [2021-11-20 07:16:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:46,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:46,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:16:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:16:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:46,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:16:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:16:46,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639688982] [2021-11-20 07:16:46,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639688982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684502389] [2021-11-20 07:16:46,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:16:46,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:46,879 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:46,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 07:16:46,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:16:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:16:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 07:16:46,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:47,019 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 [2021-11-20 07:16:47,103 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:16:47,103 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 [2021-11-20 07:16:47,157 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 17 treesize of output 13 [2021-11-20 07:16:47,942 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-20 07:16:47,943 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 34 treesize of output 57 [2021-11-20 07:16:48,373 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:16:48,373 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2021-11-20 07:16:48,409 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-20 07:16:48,409 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 43 [2021-11-20 07:16:48,584 INFO L354 Elim1Store]: treesize reduction 52, result has 45.3 percent of original size [2021-11-20 07:16:48,584 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 104 [2021-11-20 07:16:48,602 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-20 07:16:48,603 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 102 [2021-11-20 07:16:52,407 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-20 07:16:52,407 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 123 treesize of output 101 [2021-11-20 07:16:54,866 INFO L354 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2021-11-20 07:16:54,866 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 103 treesize of output 89 [2021-11-20 07:16:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:16:55,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:01,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684502389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:01,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:17:01,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2021-11-20 07:17:01,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778380356] [2021-11-20 07:17:01,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:01,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 07:17:01,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 07:17:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2353, Unknown=2, NotChecked=0, Total=2550 [2021-11-20 07:17:01,700 INFO L87 Difference]: Start difference. First operand 492 states and 606 transitions. Second operand has 41 states, 40 states have (on average 2.4) internal successors, (96), 41 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:17:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:04,352 INFO L93 Difference]: Finished difference Result 555 states and 673 transitions. [2021-11-20 07:17:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:17:04,353 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.4) internal successors, (96), 41 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2021-11-20 07:17:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:04,355 INFO L225 Difference]: With dead ends: 555 [2021-11-20 07:17:04,355 INFO L226 Difference]: Without dead ends: 555 [2021-11-20 07:17:04,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=505, Invalid=4749, Unknown=2, NotChecked=0, Total=5256 [2021-11-20 07:17:04,356 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 331 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:04,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1857 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 909 Invalid, 0 Unknown, 383 Unchecked, 0.7s Time] [2021-11-20 07:17:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-20 07:17:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 495. [2021-11-20 07:17:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 456 states have (on average 1.2609649122807018) internal successors, (575), 465 states have internal predecessors, (575), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:17:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 611 transitions. [2021-11-20 07:17:04,365 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 611 transitions. Word has length 68 [2021-11-20 07:17:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 611 transitions. [2021-11-20 07:17:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.4) internal successors, (96), 41 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:17:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 611 transitions. [2021-11-20 07:17:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:17:04,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:04,367 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:04,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:04,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:04,576 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:17:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash 663954641, now seen corresponding path program 2 times [2021-11-20 07:17:04,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:04,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844140218] [2021-11-20 07:17:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:04,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:17:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:17:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:05,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:17:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:17:05,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844140218] [2021-11-20 07:17:05,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844140218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:05,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093916587] [2021-11-20 07:17:05,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:17:05,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:05,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:05,679 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:05,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 07:17:05,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:17:05,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:17:05,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 07:17:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:05,858 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 [2021-11-20 07:17:05,873 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 [2021-11-20 07:17:06,139 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:17:06,140 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 [2021-11-20 07:17:06,170 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:17:06,171 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 [2021-11-20 07:17:06,317 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 [2021-11-20 07:17:06,328 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 25 treesize of output 21 [2021-11-20 07:17:09,026 INFO L354 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2021-11-20 07:17:09,026 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 3 case distinctions, treesize of input 29 treesize of output 34 [2021-11-20 07:17:09,077 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:17:09,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 07:17:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:17:09,750 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 07:17:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 77 [2021-11-20 07:17:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:17:09,770 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-11-20 07:17:09,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 98 [2021-11-20 07:17:10,039 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-20 07:17:10,039 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 93 [2021-11-20 07:17:10,066 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-20 07:17:10,066 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 134 treesize of output 128 [2021-11-20 07:17:11,217 INFO L354 Elim1Store]: treesize reduction 114, result has 11.6 percent of original size [2021-11-20 07:17:11,217 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 187 treesize of output 109 [2021-11-20 07:17:11,261 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-11-20 07:17:11,261 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 80 treesize of output 68 [2021-11-20 07:17:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:17:11,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:22,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093916587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:22,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:17:22,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2021-11-20 07:17:22,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409826169] [2021-11-20 07:17:22,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:22,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:17:22,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:17:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2678, Unknown=5, NotChecked=0, Total=2862 [2021-11-20 07:17:22,984 INFO L87 Difference]: Start difference. First operand 495 states and 611 transitions. Second operand has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 42 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:17:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:29,031 INFO L93 Difference]: Finished difference Result 534 states and 647 transitions. [2021-11-20 07:17:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:17:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 42 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 68 [2021-11-20 07:17:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:29,033 INFO L225 Difference]: With dead ends: 534 [2021-11-20 07:17:29,033 INFO L226 Difference]: Without dead ends: 534 [2021-11-20 07:17:29,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=393, Invalid=4293, Unknown=6, NotChecked=0, Total=4692 [2021-11-20 07:17:29,034 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 283 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:29,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1919 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1214 Invalid, 0 Unknown, 207 Unchecked, 1.4s Time] [2021-11-20 07:17:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-20 07:17:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 505. [2021-11-20 07:17:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 466 states have (on average 1.257510729613734) internal successors, (586), 475 states have internal predecessors, (586), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:17:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 622 transitions. [2021-11-20 07:17:29,044 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 622 transitions. Word has length 68 [2021-11-20 07:17:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:29,045 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 622 transitions. [2021-11-20 07:17:29,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 42 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:17:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 622 transitions. [2021-11-20 07:17:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:17:29,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:29,046 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:29,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:29,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-20 07:17:29,272 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:17:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1701564953, now seen corresponding path program 5 times [2021-11-20 07:17:29,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:29,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401836811] [2021-11-20 07:17:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:29,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:30,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:17:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:30,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:17:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:17:30,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:30,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401836811] [2021-11-20 07:17:30,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401836811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:30,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47214812] [2021-11-20 07:17:30,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:17:30,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:30,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:30,206 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:30,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 07:17:30,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:17:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:17:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:17:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:30,383 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 [2021-11-20 07:17:30,458 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 16 treesize of output 12 [2021-11-20 07:17:30,501 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:17:30,501 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 [2021-11-20 07:17:30,587 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 07:17:30,587 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 25 treesize of output 28 [2021-11-20 07:17:30,609 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 [2021-11-20 07:17:30,785 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 [2021-11-20 07:17:30,807 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-20 07:17:30,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 07:17:30,947 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 07:17:30,948 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2021-11-20 07:17:30,959 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:17:30,959 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 75 treesize of output 74 [2021-11-20 07:17:32,677 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 150 treesize of output 138 [2021-11-20 07:17:33,788 INFO L354 Elim1Store]: treesize reduction 194, result has 3.5 percent of original size [2021-11-20 07:17:33,788 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 154 treesize of output 107 [2021-11-20 07:17:34,508 INFO L354 Elim1Store]: treesize reduction 157, result has 24.9 percent of original size [2021-11-20 07:17:34,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 82 treesize of output 88 [2021-11-20 07:17:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:17:34,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47214812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:35,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:17:35,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 41 [2021-11-20 07:17:35,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818124932] [2021-11-20 07:17:35,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:35,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 07:17:35,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:35,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 07:17:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:17:35,604 INFO L87 Difference]: Start difference. First operand 505 states and 622 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:17:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:46,481 INFO L93 Difference]: Finished difference Result 835 states and 1033 transitions. [2021-11-20 07:17:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 07:17:46,482 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 67 [2021-11-20 07:17:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:46,487 INFO L225 Difference]: With dead ends: 835 [2021-11-20 07:17:46,488 INFO L226 Difference]: Without dead ends: 835 [2021-11-20 07:17:46,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=474, Invalid=4638, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 07:17:46,489 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 612 mSDsluCounter, 2851 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2963 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:46,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 2963 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1628 Invalid, 0 Unknown, 247 Unchecked, 1.7s Time] [2021-11-20 07:17:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-20 07:17:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 505. [2021-11-20 07:17:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 466 states have (on average 1.2553648068669527) internal successors, (585), 475 states have internal predecessors, (585), 10 states have call successors, (10), 7 states have call predecessors, (10), 18 states have return successors, (26), 22 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:17:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 621 transitions. [2021-11-20 07:17:46,499 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 621 transitions. Word has length 67 [2021-11-20 07:17:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:46,499 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 621 transitions. [2021-11-20 07:17:46,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:17:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 621 transitions. [2021-11-20 07:17:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:17:46,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:46,501 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:46,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:46,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:46,703 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:17:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1699932659, now seen corresponding path program 5 times [2021-11-20 07:17:46,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:46,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889204682] [2021-11-20 07:17:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:46,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:48,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:17:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:17:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:17:48,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889204682] [2021-11-20 07:17:48,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889204682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622877525] [2021-11-20 07:17:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:17:48,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:48,389 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:48,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 07:17:48,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:17:48,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:17:48,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-20 07:17:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:48,549 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 [2021-11-20 07:17:48,637 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 [2021-11-20 07:17:48,647 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 [2021-11-20 07:17:48,712 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:17:48,712 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 [2021-11-20 07:17:48,831 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:17:48,832 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 45 [2021-11-20 07:17:48,844 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:17:48,844 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 51 treesize of output 50 [2021-11-20 07:17:49,094 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-20 07:17:49,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-20 07:17:49,299 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 07:17:49,299 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 75 [2021-11-20 07:17:49,322 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-20 07:17:49,322 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 113 [2021-11-20 07:17:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:17:49,637 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-20 07:17:49,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2021-11-20 07:17:49,853 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-20 07:17:49,854 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 123 treesize of output 90 [2021-11-20 07:17:49,893 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-11-20 07:17:49,894 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 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 161 [2021-11-20 07:17:53,941 INFO L354 Elim1Store]: treesize reduction 341, result has 15.8 percent of original size [2021-11-20 07:17:53,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 383 treesize of output 200 [2021-11-20 07:17:54,049 INFO L354 Elim1Store]: treesize reduction 380, result has 3.3 percent of original size [2021-11-20 07:17:54,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 147 treesize of output 112 [2021-11-20 07:17:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:17:54,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:57,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622877525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:57,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:17:57,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 51 [2021-11-20 07:17:57,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104289900] [2021-11-20 07:17:57,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:57,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 07:17:57,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 07:17:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3373, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:17:57,514 INFO L87 Difference]: Start difference. First operand 505 states and 621 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 51 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:18:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:16,929 INFO L93 Difference]: Finished difference Result 700 states and 836 transitions. [2021-11-20 07:18:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:18:16,930 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 51 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 67 [2021-11-20 07:18:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:16,934 INFO L225 Difference]: With dead ends: 700 [2021-11-20 07:18:16,934 INFO L226 Difference]: Without dead ends: 700 [2021-11-20 07:18:16,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=338, Invalid=6136, Unknown=6, NotChecked=0, Total=6480 [2021-11-20 07:18:16,934 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 439 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:16,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 3318 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1958 Invalid, 0 Unknown, 255 Unchecked, 2.2s Time] [2021-11-20 07:18:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-20 07:18:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 543. [2021-11-20 07:18:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 501 states have (on average 1.2475049900199602) internal successors, (625), 511 states have internal predecessors, (625), 11 states have call successors, (11), 8 states have call predecessors, (11), 20 states have return successors, (28), 23 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-20 07:18:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 664 transitions. [2021-11-20 07:18:16,943 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 664 transitions. Word has length 67 [2021-11-20 07:18:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:16,944 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 664 transitions. [2021-11-20 07:18:16,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 51 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:18:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 664 transitions. [2021-11-20 07:18:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:18:16,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:16,946 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:16,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:17,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:17,159 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:18:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1591190709, now seen corresponding path program 1 times [2021-11-20 07:18:17,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:17,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091652313] [2021-11-20 07:18:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:17,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:17,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:18:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:18:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:17,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:18:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:17,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 07:18:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:18:17,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:18:17,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091652313] [2021-11-20 07:18:17,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091652313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:17,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305847873] [2021-11-20 07:18:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:17,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:17,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:17,292 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:18:17,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 07:18:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:18:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:18:17,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:18:18,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305847873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:18,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:18:18,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-20 07:18:18,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905494815] [2021-11-20 07:18:18,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:18,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:18:18,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:18:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:18:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:18:18,041 INFO L87 Difference]: Start difference. First operand 543 states and 664 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 16 states have internal predecessors, (95), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:18:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:18,433 INFO L93 Difference]: Finished difference Result 692 states and 844 transitions. [2021-11-20 07:18:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:18:18,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 16 states have internal predecessors, (95), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 70 [2021-11-20 07:18:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:18,438 INFO L225 Difference]: With dead ends: 692 [2021-11-20 07:18:18,438 INFO L226 Difference]: Without dead ends: 692 [2021-11-20 07:18:18,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:18:18,439 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 171 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:18,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 759 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:18:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-20 07:18:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 607. [2021-11-20 07:18:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 561 states have (on average 1.2424242424242424) internal successors, (697), 571 states have internal predecessors, (697), 12 states have call successors, (12), 8 states have call predecessors, (12), 23 states have return successors, (35), 27 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-20 07:18:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 744 transitions. [2021-11-20 07:18:18,453 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 744 transitions. Word has length 70 [2021-11-20 07:18:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:18,453 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 744 transitions. [2021-11-20 07:18:18,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 16 states have internal predecessors, (95), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:18:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 744 transitions. [2021-11-20 07:18:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:18:18,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:18,455 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:18,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:18,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-20 07:18:18,671 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:18:18,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1796058134, now seen corresponding path program 1 times [2021-11-20 07:18:18,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571610130] [2021-11-20 07:18:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:18,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:18:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:18:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:19,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:18:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 07:18:19,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:18:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571610130] [2021-11-20 07:18:19,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571610130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:19,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069195797] [2021-11-20 07:18:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:19,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:19,168 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:18:19,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-20 07:18:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:18:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:19,342 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 [2021-11-20 07:18:20,006 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 07:18:20,007 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 21 treesize of output 29 [2021-11-20 07:18:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:18:20,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 24 [2021-11-20 07:18:20,269 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:18:20,269 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 39 treesize of output 42 [2021-11-20 07:18:20,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:18:20,699 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-11-20 07:18:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:18:21,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:22,830 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2021-11-20 07:18:40,592 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_insert_~new_node~0#1.offset| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.base_31| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_insert_~last~0#1.base_31|)))) (store .cse0 |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_~last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2021-11-20 07:18:42,607 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_insert_#t~mem9#1.base| Int) (|ULTIMATE.start_sll_insert_~new_node~0#1.offset| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.base_31| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_insert_~last~0#1.base_31|)))) (store .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base| (store (select .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2021-11-20 07:18:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069195797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:42,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:42,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-11-20 07:18:42,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336206770] [2021-11-20 07:18:42,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:18:42,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:18:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:18:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=632, Unknown=7, NotChecked=156, Total=870 [2021-11-20 07:18:42,741 INFO L87 Difference]: Start difference. First operand 607 states and 744 transitions. Second operand has 25 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 25 states have internal predecessors, (89), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:18:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:44,394 INFO L93 Difference]: Finished difference Result 671 states and 827 transitions. [2021-11-20 07:18:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:18:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 25 states have internal predecessors, (89), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2021-11-20 07:18:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:44,397 INFO L225 Difference]: With dead ends: 671 [2021-11-20 07:18:44,397 INFO L226 Difference]: Without dead ends: 671 [2021-11-20 07:18:44,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=311, Invalid=1856, Unknown=7, NotChecked=276, Total=2450 [2021-11-20 07:18:44,398 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 319 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:44,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1152 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 632 Invalid, 0 Unknown, 276 Unchecked, 0.6s Time] [2021-11-20 07:18:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-11-20 07:18:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 607. [2021-11-20 07:18:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 561 states have (on average 1.2406417112299466) internal successors, (696), 571 states have internal predecessors, (696), 12 states have call successors, (12), 8 states have call predecessors, (12), 23 states have return successors, (35), 27 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-20 07:18:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 743 transitions. [2021-11-20 07:18:44,414 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 743 transitions. Word has length 69 [2021-11-20 07:18:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:44,415 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 743 transitions. [2021-11-20 07:18:44,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 25 states have internal predecessors, (89), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:18:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 743 transitions. [2021-11-20 07:18:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:18:44,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:44,417 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:44,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:44,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-20 07:18:44,620 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:18:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:44,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1796058133, now seen corresponding path program 1 times [2021-11-20 07:18:44,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:44,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249828478] [2021-11-20 07:18:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:44,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:45,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:18:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:45,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:18:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:45,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:18:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:18:45,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:18:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249828478] [2021-11-20 07:18:45,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249828478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199930247] [2021-11-20 07:18:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:45,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:45,187 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:18:45,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-20 07:18:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:18:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:45,364 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 [2021-11-20 07:18:45,375 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 [2021-11-20 07:18:46,486 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:18:46,486 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 16 treesize of output 18 [2021-11-20 07:18:46,506 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:18:46,507 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 15 treesize of output 15 [2021-11-20 07:18:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:18:46,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2021-11-20 07:18:46,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:18:46,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 24 [2021-11-20 07:18:46,854 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:18:46,854 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 57 treesize of output 60 [2021-11-20 07:18:46,870 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:18:46,871 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 65 treesize of output 64 [2021-11-20 07:18:47,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:18:47,406 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2021-11-20 07:18:47,412 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:18:47,413 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2021-11-20 07:18:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:18:47,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:50,040 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (forall ((|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-11-20 07:18:52,066 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (<= 0 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (forall ((|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~last~0#1.base| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (<= (+ (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|)))) (store .cse1 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4) (select |c_#length| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-11-20 07:18:54,127 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (<= 0 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_~last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (forall ((|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int) (v_subst_1 Int)) (<= (+ (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|)))) (store .cse1 |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_insert_~last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4) (select |c_#length| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| v_subst_1)))) (store .cse2 |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_insert_~last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-11-20 07:18:56,159 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_insert_#t~mem9#1.base| Int) (|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int) (v_subst_1 Int)) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|)))) (store .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base| (store (select .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4) (select |c_#length| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| v_subst_1)))) (store .cse1 |ULTIMATE.start_sll_insert_#t~mem9#1.base| (store (select .cse1 |ULTIMATE.start_sll_insert_#t~mem9#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((|ULTIMATE.start_sll_insert_#t~mem9#1.base| Int) (|ULTIMATE.start_sll_insert_~last~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (<= 0 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|)))) (store .cse2 |ULTIMATE.start_sll_insert_#t~mem9#1.base| (store (select .cse2 |ULTIMATE.start_sll_insert_#t~mem9#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-11-20 07:18:56,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199930247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:56,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:56,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-11-20 07:18:56,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381958539] [2021-11-20 07:18:56,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:56,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:18:56,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:18:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:18:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=846, Unknown=4, NotChecked=244, Total=1190 [2021-11-20 07:18:56,709 INFO L87 Difference]: Start difference. First operand 607 states and 743 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:19:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:00,533 INFO L93 Difference]: Finished difference Result 782 states and 963 transitions. [2021-11-20 07:19:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:19:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2021-11-20 07:19:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:00,537 INFO L225 Difference]: With dead ends: 782 [2021-11-20 07:19:00,537 INFO L226 Difference]: Without dead ends: 782 [2021-11-20 07:19:00,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=540, Invalid=3504, Unknown=4, NotChecked=508, Total=4556 [2021-11-20 07:19:00,538 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 410 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:00,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 1586 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1160 Invalid, 0 Unknown, 394 Unchecked, 1.1s Time] [2021-11-20 07:19:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-20 07:19:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 638. [2021-11-20 07:19:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 591 states have (on average 1.248730964467005) internal successors, (738), 600 states have internal predecessors, (738), 13 states have call successors, (13), 8 states have call predecessors, (13), 23 states have return successors, (38), 29 states have call predecessors, (38), 13 states have call successors, (38) [2021-11-20 07:19:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 789 transitions. [2021-11-20 07:19:00,561 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 789 transitions. Word has length 69 [2021-11-20 07:19:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:00,561 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 789 transitions. [2021-11-20 07:19:00,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:19:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 789 transitions. [2021-11-20 07:19:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:19:00,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:00,562 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:00,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-20 07:19:00,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-20 07:19:00,763 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:19:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931416, now seen corresponding path program 1 times [2021-11-20 07:19:00,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:00,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820491681] [2021-11-20 07:19:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:00,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:01,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:01,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:19:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 07:19:01,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:01,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820491681] [2021-11-20 07:19:01,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820491681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:01,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307308649] [2021-11-20 07:19:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:01,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:01,273 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:01,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-20 07:19:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:19:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:01,418 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 6 treesize of output 5 [2021-11-20 07:19:01,447 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 [2021-11-20 07:19:01,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:19:01,460 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 [2021-11-20 07:19:01,518 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 16 treesize of output 12 [2021-11-20 07:19:01,981 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 35 treesize of output 23 [2021-11-20 07:19:02,690 INFO L354 Elim1Store]: treesize reduction 36, result has 47.8 percent of original size [2021-11-20 07:19:02,690 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 50 treesize of output 57 [2021-11-20 07:19:02,987 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:19:02,988 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 16 treesize of output 18 [2021-11-20 07:19:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:19:03,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:07,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:19:07,727 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 43 treesize of output 47 [2021-11-20 07:19:09,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307308649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:09,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:09,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 34 [2021-11-20 07:19:09,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074890524] [2021-11-20 07:19:09,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:09,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:19:09,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:19:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:19:09,318 INFO L87 Difference]: Start difference. First operand 638 states and 789 transitions. Second operand has 35 states, 34 states have (on average 2.764705882352941) internal successors, (94), 35 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:11,221 INFO L93 Difference]: Finished difference Result 643 states and 789 transitions. [2021-11-20 07:19:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:19:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.764705882352941) internal successors, (94), 35 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-20 07:19:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:11,224 INFO L225 Difference]: With dead ends: 643 [2021-11-20 07:19:11,224 INFO L226 Difference]: Without dead ends: 643 [2021-11-20 07:19:11,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=281, Invalid=3625, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 07:19:11,225 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 88 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:11,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1550 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 620 Invalid, 0 Unknown, 342 Unchecked, 0.6s Time] [2021-11-20 07:19:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-20 07:19:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 638. [2021-11-20 07:19:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 591 states have (on average 1.2470389170896785) internal successors, (737), 600 states have internal predecessors, (737), 13 states have call successors, (13), 8 states have call predecessors, (13), 23 states have return successors, (38), 29 states have call predecessors, (38), 13 states have call successors, (38) [2021-11-20 07:19:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 788 transitions. [2021-11-20 07:19:11,239 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 788 transitions. Word has length 68 [2021-11-20 07:19:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:11,239 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 788 transitions. [2021-11-20 07:19:11,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.764705882352941) internal successors, (94), 35 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 788 transitions. [2021-11-20 07:19:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:19:11,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:11,241 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:11,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-20 07:19:11,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-20 07:19:11,456 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:19:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931415, now seen corresponding path program 1 times [2021-11-20 07:19:11,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249006195] [2021-11-20 07:19:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:11,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:11,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:19:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:19:11,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249006195] [2021-11-20 07:19:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249006195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630845479] [2021-11-20 07:19:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:11,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:11,911 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:11,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-20 07:19:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:19:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:12,038 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 [2021-11-20 07:19:12,088 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 [2021-11-20 07:19:13,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:19:13,353 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 70 treesize of output 73 [2021-11-20 07:19:13,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:19:13,366 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-11-20 07:19:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:19:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:16,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630845479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:16,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:16,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2021-11-20 07:19:16,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390144076] [2021-11-20 07:19:16,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:16,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:19:16,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:19:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2015, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 07:19:16,113 INFO L87 Difference]: Start difference. First operand 638 states and 788 transitions. Second operand has 35 states, 34 states have (on average 2.764705882352941) internal successors, (94), 35 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:17,712 INFO L93 Difference]: Finished difference Result 643 states and 788 transitions. [2021-11-20 07:19:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:19:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.764705882352941) internal successors, (94), 35 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-20 07:19:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:17,715 INFO L225 Difference]: With dead ends: 643 [2021-11-20 07:19:17,715 INFO L226 Difference]: Without dead ends: 643 [2021-11-20 07:19:17,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=303, Invalid=3479, Unknown=0, NotChecked=0, Total=3782 [2021-11-20 07:19:17,716 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 81 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:17,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1479 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 513 Invalid, 0 Unknown, 212 Unchecked, 0.5s Time] [2021-11-20 07:19:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-20 07:19:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 638. [2021-11-20 07:19:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 591 states have (on average 1.245346869712352) internal successors, (736), 600 states have internal predecessors, (736), 13 states have call successors, (13), 8 states have call predecessors, (13), 23 states have return successors, (38), 29 states have call predecessors, (38), 13 states have call successors, (38) [2021-11-20 07:19:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 787 transitions. [2021-11-20 07:19:17,731 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 787 transitions. Word has length 68 [2021-11-20 07:19:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 787 transitions. [2021-11-20 07:19:17,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.764705882352941) internal successors, (94), 35 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 787 transitions. [2021-11-20 07:19:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 07:19:17,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:17,734 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:17,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:17,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-20 07:19:17,960 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:19:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1546754997, now seen corresponding path program 2 times [2021-11-20 07:19:17,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:17,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632390299] [2021-11-20 07:19:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:17,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:19:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:19:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:19:19,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632390299] [2021-11-20 07:19:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632390299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:19,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420399986] [2021-11-20 07:19:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:19:19,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:19,169 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-20 07:19:19,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:19:19,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:19:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 07:19:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:19,495 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 [2021-11-20 07:19:19,592 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 16 treesize of output 12 [2021-11-20 07:19:21,139 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:19:21,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 07:19:21,800 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:19:21,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 18 [2021-11-20 07:19:21,854 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-20 07:19:21,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 38 [2021-11-20 07:19:22,118 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-20 07:19:22,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 82 [2021-11-20 07:19:22,143 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-20 07:19:22,143 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 77 [2021-11-20 07:19:24,295 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-20 07:19:24,295 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 103 treesize of output 81 [2021-11-20 07:19:25,460 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-11-20 07:19:25,460 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 70 treesize of output 64 [2021-11-20 07:19:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:19:25,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:27,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420399986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:27,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:27,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2021-11-20 07:19:27,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474547411] [2021-11-20 07:19:27,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:27,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 07:19:27,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 07:19:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:19:27,707 INFO L87 Difference]: Start difference. First operand 638 states and 787 transitions. Second operand has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:19:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:32,803 INFO L93 Difference]: Finished difference Result 774 states and 964 transitions. [2021-11-20 07:19:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:19:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 71 [2021-11-20 07:19:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:32,808 INFO L225 Difference]: With dead ends: 774 [2021-11-20 07:19:32,808 INFO L226 Difference]: Without dead ends: 774 [2021-11-20 07:19:32,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=368, Invalid=3792, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 07:19:32,809 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 341 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:32,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 2155 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 929 Invalid, 0 Unknown, 233 Unchecked, 1.0s Time] [2021-11-20 07:19:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-20 07:19:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 638. [2021-11-20 07:19:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 591 states have (on average 1.2436548223350254) internal successors, (735), 600 states have internal predecessors, (735), 13 states have call successors, (13), 8 states have call predecessors, (13), 23 states have return successors, (38), 29 states have call predecessors, (38), 13 states have call successors, (38) [2021-11-20 07:19:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 786 transitions. [2021-11-20 07:19:32,824 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 786 transitions. Word has length 71 [2021-11-20 07:19:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:32,825 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 786 transitions. [2021-11-20 07:19:32,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:19:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 786 transitions. [2021-11-20 07:19:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 07:19:32,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:32,832 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:32,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:33,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:33,048 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:19:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1548387291, now seen corresponding path program 3 times [2021-11-20 07:19:33,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103631094] [2021-11-20 07:19:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:33,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:34,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:19:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:34,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:19:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:19:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:19:34,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103631094] [2021-11-20 07:19:34,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103631094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077075803] [2021-11-20 07:19:34,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:19:34,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:34,923 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:34,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-20 07:19:35,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:19:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:19:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 07:19:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:35,047 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 [2021-11-20 07:19:35,172 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:19:35,172 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 [2021-11-20 07:19:35,305 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 [2021-11-20 07:19:35,311 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 [2021-11-20 07:19:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:19:35,604 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:19:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-20 07:19:35,818 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 07:19:35,818 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 50 treesize of output 49 [2021-11-20 07:19:35,832 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-20 07:19:35,833 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 59 treesize of output 58 [2021-11-20 07:19:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:19:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:19:39,566 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-11-20 07:19:39,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 07:19:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:19:40,506 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-20 07:19:40,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 136 treesize of output 95 [2021-11-20 07:19:40,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:19:40,539 INFO L354 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2021-11-20 07:19:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 132 treesize of output 133 [2021-11-20 07:19:40,850 INFO L354 Elim1Store]: treesize reduction 132, result has 14.3 percent of original size [2021-11-20 07:19:40,851 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 102 [2021-11-20 07:19:40,895 INFO L354 Elim1Store]: treesize reduction 276, result has 14.3 percent of original size [2021-11-20 07:19:40,895 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 165 treesize of output 166 [2021-11-20 07:19:43,354 INFO L354 Elim1Store]: treesize reduction 247, result has 5.4 percent of original size [2021-11-20 07:19:43,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 286 treesize of output 136 [2021-11-20 07:19:43,417 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-11-20 07:19:43,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 69 [2021-11-20 07:19:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:19:43,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077075803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:57,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:57,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2021-11-20 07:19:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65684282] [2021-11-20 07:19:57,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:57,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 07:19:57,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 07:19:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3389, Unknown=5, NotChecked=0, Total=3540 [2021-11-20 07:19:57,766 INFO L87 Difference]: Start difference. First operand 638 states and 786 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:20:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:06,489 INFO L93 Difference]: Finished difference Result 703 states and 858 transitions. [2021-11-20 07:20:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:20:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 71 [2021-11-20 07:20:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:06,492 INFO L225 Difference]: With dead ends: 703 [2021-11-20 07:20:06,492 INFO L226 Difference]: Without dead ends: 691 [2021-11-20 07:20:06,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=348, Invalid=6127, Unknown=5, NotChecked=0, Total=6480 [2021-11-20 07:20:06,493 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 143 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:06,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2510 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1376 Invalid, 0 Unknown, 549 Unchecked, 1.6s Time] [2021-11-20 07:20:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-11-20 07:20:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 676. [2021-11-20 07:20:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 628 states have (on average 1.2292993630573248) internal successors, (772), 635 states have internal predecessors, (772), 13 states have call successors, (13), 9 states have call predecessors, (13), 24 states have return successors, (36), 31 states have call predecessors, (36), 13 states have call successors, (36) [2021-11-20 07:20:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 821 transitions. [2021-11-20 07:20:06,505 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 821 transitions. Word has length 71 [2021-11-20 07:20:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:06,505 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 821 transitions. [2021-11-20 07:20:06,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:20:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 821 transitions. [2021-11-20 07:20:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:20:06,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:06,507 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:06,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:06,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-20 07:20:06,732 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:20:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash -735984296, now seen corresponding path program 6 times [2021-11-20 07:20:06,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:06,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930180483] [2021-11-20 07:20:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:06,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:07,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 07:20:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:20:07,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:07,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930180483] [2021-11-20 07:20:07,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930180483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:07,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776701932] [2021-11-20 07:20:07,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:20:07,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:07,271 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-20 07:20:07,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 07:20:07,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:20:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:20:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:20:08,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:20:10,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776701932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:20:10,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:20:10,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 56 [2021-11-20 07:20:10,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121161962] [2021-11-20 07:20:10,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:10,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 07:20:10,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 07:20:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:20:10,017 INFO L87 Difference]: Start difference. First operand 676 states and 821 transitions. Second operand has 56 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 52 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:20:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:14,050 INFO L93 Difference]: Finished difference Result 1661 states and 2112 transitions. [2021-11-20 07:20:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 07:20:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 52 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-11-20 07:20:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:14,057 INFO L225 Difference]: With dead ends: 1661 [2021-11-20 07:20:14,057 INFO L226 Difference]: Without dead ends: 1661 [2021-11-20 07:20:14,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=941, Invalid=9159, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 07:20:14,058 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 608 mSDsluCounter, 4570 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 4713 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:14,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 4713 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:20:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-11-20 07:20:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 740. [2021-11-20 07:20:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 689 states have (on average 1.216255442670537) internal successors, (838), 696 states have internal predecessors, (838), 15 states have call successors, (15), 9 states have call predecessors, (15), 25 states have return successors, (43), 34 states have call predecessors, (43), 15 states have call successors, (43) [2021-11-20 07:20:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 896 transitions. [2021-11-20 07:20:14,093 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 896 transitions. Word has length 70 [2021-11-20 07:20:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:14,094 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 896 transitions. [2021-11-20 07:20:14,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 52 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:20:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 896 transitions. [2021-11-20 07:20:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 07:20:14,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:14,096 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:14,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:14,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:14,312 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:20:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash 333176411, now seen corresponding path program 1 times [2021-11-20 07:20:14,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035824867] [2021-11-20 07:20:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:14,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:14,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:20:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:20:14,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035824867] [2021-11-20 07:20:14,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035824867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625227564] [2021-11-20 07:20:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:14,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:14,815 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:14,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-20 07:20:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:20:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:19,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-20 07:20:19,794 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:20:19,794 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 29 treesize of output 36 [2021-11-20 07:20:19,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:20:19,914 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 07:20:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:20:19,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:21,289 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2021-11-20 07:20:23,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_insert_~last~0#1.base| Int) (|ULTIMATE.start_sll_insert_~new_node~0#1.offset| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2021-11-20 07:20:37,329 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_insert_#t~mem9#1.base| Int) (|ULTIMATE.start_sll_insert_~new_node~0#1.offset| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.base_42| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_insert_~last~0#1.base_42|)))) (store .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base| (store (select .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2021-11-20 07:20:39,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) (= |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| 0) (forall ((|ULTIMATE.start_sll_insert_#t~mem9#1.base| Int) (|ULTIMATE.start_sll_insert_~new_node~0#1.offset| Int) (|v_ULTIMATE.start_sll_insert_~last~0#1.base_42| Int) (|ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| Int)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_insert_~last~0#1.base_42|)))) (store .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base| (store (select .cse0 |ULTIMATE.start_sll_insert_#t~mem9#1.base|) |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))))) is different from false [2021-11-20 07:20:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625227564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:39,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:39,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 26 [2021-11-20 07:20:39,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284225594] [2021-11-20 07:20:39,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:39,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:20:39,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:39,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:20:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=630, Unknown=9, NotChecked=212, Total=930 [2021-11-20 07:20:39,392 INFO L87 Difference]: Start difference. First operand 740 states and 896 transitions. Second operand has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:20:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:41,756 INFO L93 Difference]: Finished difference Result 781 states and 942 transitions. [2021-11-20 07:20:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:20:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 72 [2021-11-20 07:20:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:41,761 INFO L225 Difference]: With dead ends: 781 [2021-11-20 07:20:41,761 INFO L226 Difference]: Without dead ends: 781 [2021-11-20 07:20:41,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=359, Invalid=2000, Unknown=9, NotChecked=388, Total=2756 [2021-11-20 07:20:41,762 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 404 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:41,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1478 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 762 Invalid, 0 Unknown, 89 Unchecked, 0.8s Time] [2021-11-20 07:20:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-11-20 07:20:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 743. [2021-11-20 07:20:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 692 states have (on average 1.2138728323699421) internal successors, (840), 699 states have internal predecessors, (840), 15 states have call successors, (15), 9 states have call predecessors, (15), 25 states have return successors, (43), 34 states have call predecessors, (43), 15 states have call successors, (43) [2021-11-20 07:20:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 898 transitions. [2021-11-20 07:20:41,776 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 898 transitions. Word has length 72 [2021-11-20 07:20:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:41,776 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 898 transitions. [2021-11-20 07:20:41,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:20:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 898 transitions. [2021-11-20 07:20:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 07:20:41,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:41,778 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:20:41,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:42,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:42,004 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:20:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash 334808705, now seen corresponding path program 1 times [2021-11-20 07:20:42,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:42,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453136242] [2021-11-20 07:20:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:42,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:20:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:42,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:20:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:42,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:20:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:20:42,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:42,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453136242] [2021-11-20 07:20:42,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453136242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:42,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378442267] [2021-11-20 07:20:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:42,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:42,844 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:42,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-20 07:20:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:20:42,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:42,973 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 [2021-11-20 07:20:43,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:20:43,068 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 [2021-11-20 07:20:43,209 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 [2021-11-20 07:20:43,223 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 [2021-11-20 07:20:43,318 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 16 treesize of output 12 [2021-11-20 07:20:44,559 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:20:44,559 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 16 treesize of output 18 [2021-11-20 07:20:44,588 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 07:20:44,589 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 21 treesize of output 29 [2021-11-20 07:20:44,815 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 [2021-11-20 07:20:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:45,422 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:20:45,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 46 [2021-11-20 07:20:45,524 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:20:45,524 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 51 [2021-11-20 07:20:45,971 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-11-20 07:20:45,972 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 99 treesize of output 53 [2021-11-20 07:20:45,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:20:45,978 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 25 treesize of output 21 [2021-11-20 07:20:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:20:46,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:54,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378442267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:54,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:54,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-11-20 07:20:54,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050028130] [2021-11-20 07:20:54,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:54,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 07:20:54,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 07:20:54,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2023, Unknown=5, NotChecked=0, Total=2162 [2021-11-20 07:20:54,110 INFO L87 Difference]: Start difference. First operand 743 states and 898 transitions. Second operand has 38 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:21:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:00,770 INFO L93 Difference]: Finished difference Result 990 states and 1196 transitions. [2021-11-20 07:21:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:21:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 72 [2021-11-20 07:21:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:00,775 INFO L225 Difference]: With dead ends: 990 [2021-11-20 07:21:00,775 INFO L226 Difference]: Without dead ends: 990 [2021-11-20 07:21:00,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=866, Invalid=6269, Unknown=5, NotChecked=0, Total=7140 [2021-11-20 07:21:00,777 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 576 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:00,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 2503 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2058 Invalid, 0 Unknown, 474 Unchecked, 2.3s Time] [2021-11-20 07:21:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-11-20 07:21:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 831. [2021-11-20 07:21:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 775 states have (on average 1.2245161290322581) internal successors, (949), 782 states have internal predecessors, (949), 17 states have call successors, (17), 10 states have call predecessors, (17), 28 states have return successors, (49), 38 states have call predecessors, (49), 17 states have call successors, (49) [2021-11-20 07:21:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1015 transitions. [2021-11-20 07:21:00,792 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1015 transitions. Word has length 72 [2021-11-20 07:21:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:00,792 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1015 transitions. [2021-11-20 07:21:00,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:21:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1015 transitions. [2021-11-20 07:21:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 07:21:00,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:00,794 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:21:00,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-20 07:21:00,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-20 07:21:01,000 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 07:21:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:01,000 INFO L85 PathProgramCache]: Analyzing trace with hash 334808706, now seen corresponding path program 1 times [2021-11-20 07:21:01,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:01,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432538109] [2021-11-20 07:21:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:01,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:21:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:21:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 07:21:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:21:01,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432538109] [2021-11-20 07:21:01,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432538109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:21:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697388204] [2021-11-20 07:21:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:01,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:21:01,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:21:01,823 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:21:01,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd191a3-7ab4-4039-b838-0da818be3a2d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-20 07:21:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:21:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:21:01,936 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 [2021-11-20 07:21:02,012 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:21:02,013 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 [2021-11-20 07:21:02,231 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 16 treesize of output 12 [2021-11-20 07:21:04,509 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_59| Int)) (and (not (= |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_59| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_59|) 0)) 0))) (< |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_59|))) is different from true [2021-11-20 07:21:06,703 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_60| Int)) (and (< |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_60|) (not (= |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_60| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_60|) 0)) 0))))) is different from true [2021-11-20 07:21:06,857 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 [2021-11-20 07:21:07,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:21:07,510 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 07:21:07,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 36 [2021-11-20 07:21:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:21:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2021-11-20 07:21:07,748 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-20 07:21:07,748 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 70 [2021-11-20 07:21:07,766 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:21:07,766 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 101 treesize of output 83 [2021-11-20 07:21:08,346 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-11-20 07:21:08,347 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 112 treesize of output 63 [2021-11-20 07:21:08,352 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:21:08,353 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 57 treesize of output 40 [2021-11-20 07:21:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 16 not checked. [2021-11-20 07:21:08,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:21:30,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:21:30,239 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 12382 treesize of output 10455