./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN --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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:56:23,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:56:23,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:56:23,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:56:23,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:56:23,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:56:23,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:56:23,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:56:23,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:56:23,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:56:23,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:56:23,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:56:23,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:56:23,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:56:23,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:56:23,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:56:23,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:56:23,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:56:23,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:56:23,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:56:23,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:56:23,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:56:23,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:56:23,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:56:23,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:56:23,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:56:23,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:56:23,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:56:23,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:56:23,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:56:23,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:56:23,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:56:23,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:56:23,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:56:23,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:56:23,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:56:23,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:56:23,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:56:23,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:56:23,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:56:23,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:56:23,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:56:23,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:56:23,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:56:23,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:56:23,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:56:23,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:56:23,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:56:23,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:56:23,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:56:23,143 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:56:23,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:56:23,144 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:56:23,144 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:56:23,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:56:23,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:56:23,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:56:23,145 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:56:23,145 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:56:23,146 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:56:23,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:56:23,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:56:23,147 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:56:23,147 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:56:23,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:56:23,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:56:23,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:56:23,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:56:23,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:56:23,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:56:23,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:56:23,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:56:23,150 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_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2022-11-20 11:56:23,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:56:23,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:56:23,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:56:23,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:56:23,495 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:56:23,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2022-11-20 11:56:26,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:56:27,213 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:56:27,214 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2022-11-20 11:56:27,228 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/data/067bf4bc4/ace30c4b09d4445eaf33d0aae1dcb067/FLAG031c81237 [2022-11-20 11:56:27,246 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/data/067bf4bc4/ace30c4b09d4445eaf33d0aae1dcb067 [2022-11-20 11:56:27,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:56:27,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:56:27,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:56:27,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:56:27,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:56:27,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:27,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfd255b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27, skipping insertion in model container [2022-11-20 11:56:27,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:27,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:56:27,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:56:27,747 WARN L237 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_e1593e98-a611-4111-994c-44e76cc83166/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2022-11-20 11:56:27,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:56:27,833 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:56:27,894 WARN L237 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_e1593e98-a611-4111-994c-44e76cc83166/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2022-11-20 11:56:27,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:56:27,969 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:56:27,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27 WrapperNode [2022-11-20 11:56:27,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:56:27,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:56:27,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:56:27,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:56:27,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,038 INFO L138 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 294 [2022-11-20 11:56:28,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:56:28,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:56:28,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:56:28,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:56:28,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:56:28,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:56:28,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:56:28,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:56:28,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (1/1) ... [2022-11-20 11:56:28,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:56:28,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:28,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:56:28,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:56:28,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:56:28,212 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2022-11-20 11:56:28,213 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2022-11-20 11:56:28,213 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-20 11:56:28,213 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-20 11:56:28,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:56:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:56:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:56:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:56:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:56:28,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:56:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:56:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:56:28,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:56:28,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:56:28,391 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:56:28,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:56:29,453 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:56:29,465 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:56:29,465 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-20 11:56:29,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:56:29 BoogieIcfgContainer [2022-11-20 11:56:29,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:56:29,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:56:29,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:56:29,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:56:29,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:56:27" (1/3) ... [2022-11-20 11:56:29,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca16f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:56:29, skipping insertion in model container [2022-11-20 11:56:29,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:56:27" (2/3) ... [2022-11-20 11:56:29,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca16f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:56:29, skipping insertion in model container [2022-11-20 11:56:29,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:56:29" (3/3) ... [2022-11-20 11:56:29,480 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2022-11-20 11:56:29,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:56:29,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2022-11-20 11:56:29,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:56:29,576 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b9375c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:56:29,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2022-11-20 11:56:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 139 states have (on average 2.194244604316547) internal successors, (305), 259 states have internal predecessors, (305), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:56:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:56:29,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:29,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:56:29,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash 56404890, now seen corresponding path program 1 times [2022-11-20 11:56:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73660498] [2022-11-20 11:56:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:29,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:29,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:29,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73660498] [2022-11-20 11:56:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73660498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:29,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:29,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:56:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955647349] [2022-11-20 11:56:29,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:29,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:56:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:56:29,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:56:29,824 INFO L87 Difference]: Start difference. First operand has 262 states, 139 states have (on average 2.194244604316547) internal successors, (305), 259 states have internal predecessors, (305), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:29,889 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2022-11-20 11:56:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:56:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:56:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:29,909 INFO L225 Difference]: With dead ends: 260 [2022-11-20 11:56:29,909 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 11:56:29,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:56:29,916 INFO L413 NwaCegarLoop]: 285 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, 285 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 [2022-11-20 11:56:29,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:56:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 11:56:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-11-20 11:56:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 137 states have (on average 1.9416058394160585) internal successors, (266), 255 states have internal predecessors, (266), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 283 transitions. [2022-11-20 11:56:29,986 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 283 transitions. Word has length 5 [2022-11-20 11:56:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:29,987 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 283 transitions. [2022-11-20 11:56:29,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 283 transitions. [2022-11-20 11:56:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:56:29,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:29,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:56:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:56:29,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491005, now seen corresponding path program 1 times [2022-11-20 11:56:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:29,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906134166] [2022-11-20 11:56:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:30,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906134166] [2022-11-20 11:56:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906134166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:30,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:30,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:56:30,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392135897] [2022-11-20 11:56:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:30,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:56:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:56:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:30,049 INFO L87 Difference]: Start difference. First operand 258 states and 283 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:30,368 INFO L93 Difference]: Finished difference Result 391 states and 435 transitions. [2022-11-20 11:56:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:56:30,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:56:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:30,379 INFO L225 Difference]: With dead ends: 391 [2022-11-20 11:56:30,379 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 11:56:30,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:30,387 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 133 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:30,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 396 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 11:56:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 261. [2022-11-20 11:56:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 140 states have (on average 1.9285714285714286) internal successors, (270), 258 states have internal predecessors, (270), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 287 transitions. [2022-11-20 11:56:30,443 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 287 transitions. Word has length 6 [2022-11-20 11:56:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:30,443 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 287 transitions. [2022-11-20 11:56:30,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 287 transitions. [2022-11-20 11:56:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:56:30,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:30,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:56:30,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:56:30,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:30,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491563, now seen corresponding path program 1 times [2022-11-20 11:56:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934171083] [2022-11-20 11:56:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:30,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:30,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934171083] [2022-11-20 11:56:30,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934171083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:30,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:30,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:56:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457860418] [2022-11-20 11:56:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:30,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:56:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:56:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:30,564 INFO L87 Difference]: Start difference. First operand 261 states and 287 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:30,988 INFO L93 Difference]: Finished difference Result 439 states and 489 transitions. [2022-11-20 11:56:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:56:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:56:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:30,991 INFO L225 Difference]: With dead ends: 439 [2022-11-20 11:56:30,991 INFO L226 Difference]: Without dead ends: 439 [2022-11-20 11:56:30,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:31,000 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 199 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:31,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 569 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:56:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-20 11:56:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 259. [2022-11-20 11:56:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 140 states have (on average 1.9142857142857144) internal successors, (268), 256 states have internal predecessors, (268), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2022-11-20 11:56:31,047 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 6 [2022-11-20 11:56:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:31,048 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2022-11-20 11:56:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2022-11-20 11:56:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:56:31,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:31,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:56:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:56:31,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491564, now seen corresponding path program 1 times [2022-11-20 11:56:31,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:31,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859561486] [2022-11-20 11:56:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:31,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:31,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859561486] [2022-11-20 11:56:31,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859561486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:31,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:31,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:56:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261881434] [2022-11-20 11:56:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:31,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:56:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:56:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:31,204 INFO L87 Difference]: Start difference. First operand 259 states and 285 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:31,486 INFO L93 Difference]: Finished difference Result 400 states and 444 transitions. [2022-11-20 11:56:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:56:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:56:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:31,489 INFO L225 Difference]: With dead ends: 400 [2022-11-20 11:56:31,489 INFO L226 Difference]: Without dead ends: 400 [2022-11-20 11:56:31,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:31,502 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 162 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:31,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 560 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-20 11:56:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 257. [2022-11-20 11:56:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 140 states have (on average 1.9) internal successors, (266), 254 states have internal predecessors, (266), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 283 transitions. [2022-11-20 11:56:31,519 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 283 transitions. Word has length 6 [2022-11-20 11:56:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:31,519 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 283 transitions. [2022-11-20 11:56:31,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 283 transitions. [2022-11-20 11:56:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:56:31,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:31,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:56:31,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 6274696, now seen corresponding path program 1 times [2022-11-20 11:56:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881294977] [2022-11-20 11:56:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881294977] [2022-11-20 11:56:31,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881294977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:31,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:31,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:56:31,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189420727] [2022-11-20 11:56:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:31,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:56:31,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:56:31,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:31,571 INFO L87 Difference]: Start difference. First operand 257 states and 283 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:31,609 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2022-11-20 11:56:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:56:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:56:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:31,611 INFO L225 Difference]: With dead ends: 272 [2022-11-20 11:56:31,611 INFO L226 Difference]: Without dead ends: 271 [2022-11-20 11:56:31,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:31,613 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 14 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:31,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 537 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:56:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-20 11:56:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 256. [2022-11-20 11:56:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 253 states have internal predecessors, (264), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2022-11-20 11:56:31,622 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 8 [2022-11-20 11:56:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:31,623 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2022-11-20 11:56:31,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2022-11-20 11:56:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:56:31,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:31,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:56:31,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -849555632, now seen corresponding path program 1 times [2022-11-20 11:56:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:31,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523504523] [2022-11-20 11:56:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:31,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:31,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523504523] [2022-11-20 11:56:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523504523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:31,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:31,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:56:31,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014785082] [2022-11-20 11:56:31,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:56:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:56:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:31,864 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:32,107 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2022-11-20 11:56:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:56:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:56:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:32,109 INFO L225 Difference]: With dead ends: 342 [2022-11-20 11:56:32,110 INFO L226 Difference]: Without dead ends: 342 [2022-11-20 11:56:32,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:32,110 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 160 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:32,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 346 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:56:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-20 11:56:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 254. [2022-11-20 11:56:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 139 states have (on average 1.8848920863309353) internal successors, (262), 251 states have internal predecessors, (262), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 279 transitions. [2022-11-20 11:56:32,118 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 279 transitions. Word has length 11 [2022-11-20 11:56:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:32,118 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 279 transitions. [2022-11-20 11:56:32,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 279 transitions. [2022-11-20 11:56:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:56:32,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:32,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:32,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:56:32,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash -849555633, now seen corresponding path program 1 times [2022-11-20 11:56:32,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:32,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400194176] [2022-11-20 11:56:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400194176] [2022-11-20 11:56:32,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400194176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:32,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:32,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:56:32,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417152633] [2022-11-20 11:56:32,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:32,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:56:32,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:56:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:32,241 INFO L87 Difference]: Start difference. First operand 254 states and 279 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:32,531 INFO L93 Difference]: Finished difference Result 377 states and 416 transitions. [2022-11-20 11:56:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:56:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:56:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:32,536 INFO L225 Difference]: With dead ends: 377 [2022-11-20 11:56:32,536 INFO L226 Difference]: Without dead ends: 377 [2022-11-20 11:56:32,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:56:32,537 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 193 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:32,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 312 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-20 11:56:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 252. [2022-11-20 11:56:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 139 states have (on average 1.870503597122302) internal successors, (260), 249 states have internal predecessors, (260), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 277 transitions. [2022-11-20 11:56:32,547 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 277 transitions. Word has length 11 [2022-11-20 11:56:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:32,548 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 277 transitions. [2022-11-20 11:56:32,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 277 transitions. [2022-11-20 11:56:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:56:32,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:32,549 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:32,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:56:32,550 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash 321246795, now seen corresponding path program 1 times [2022-11-20 11:56:32,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:32,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993427412] [2022-11-20 11:56:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:32,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993427412] [2022-11-20 11:56:32,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993427412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:32,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:32,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:56:32,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072389538] [2022-11-20 11:56:32,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:32,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:56:32,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:56:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:56:32,703 INFO L87 Difference]: Start difference. First operand 252 states and 277 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:32,773 INFO L93 Difference]: Finished difference Result 407 states and 447 transitions. [2022-11-20 11:56:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:56:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:56:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:32,776 INFO L225 Difference]: With dead ends: 407 [2022-11-20 11:56:32,778 INFO L226 Difference]: Without dead ends: 407 [2022-11-20 11:56:32,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:32,779 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 602 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:32,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 508 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:56:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-20 11:56:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 252. [2022-11-20 11:56:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 139 states have (on average 1.8633093525179856) internal successors, (259), 249 states have internal predecessors, (259), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 276 transitions. [2022-11-20 11:56:32,788 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 276 transitions. Word has length 17 [2022-11-20 11:56:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:32,792 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 276 transitions. [2022-11-20 11:56:32,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 276 transitions. [2022-11-20 11:56:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:56:32,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:32,793 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:56:32,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash -519843690, now seen corresponding path program 1 times [2022-11-20 11:56:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:32,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568683027] [2022-11-20 11:56:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:32,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:32,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568683027] [2022-11-20 11:56:32,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568683027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:32,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:32,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:56:32,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712008090] [2022-11-20 11:56:32,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:32,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:32,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:32,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:32,951 INFO L87 Difference]: Start difference. First operand 252 states and 276 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:33,150 INFO L93 Difference]: Finished difference Result 714 states and 789 transitions. [2022-11-20 11:56:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:56:33,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:56:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:33,155 INFO L225 Difference]: With dead ends: 714 [2022-11-20 11:56:33,156 INFO L226 Difference]: Without dead ends: 714 [2022-11-20 11:56:33,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:56:33,159 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 1479 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:33,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 705 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:56:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-20 11:56:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 280. [2022-11-20 11:56:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 168 states have (on average 1.8571428571428572) internal successors, (312), 277 states have internal predecessors, (312), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 328 transitions. [2022-11-20 11:56:33,175 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 328 transitions. Word has length 19 [2022-11-20 11:56:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 328 transitions. [2022-11-20 11:56:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 328 transitions. [2022-11-20 11:56:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:56:33,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:33,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:33,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:56:33,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -519854939, now seen corresponding path program 1 times [2022-11-20 11:56:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694619675] [2022-11-20 11:56:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:33,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694619675] [2022-11-20 11:56:33,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694619675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:33,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:33,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:56:33,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858081523] [2022-11-20 11:56:33,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:33,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:33,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:33,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:33,319 INFO L87 Difference]: Start difference. First operand 280 states and 328 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:33,872 INFO L93 Difference]: Finished difference Result 466 states and 533 transitions. [2022-11-20 11:56:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:56:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:56:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:33,876 INFO L225 Difference]: With dead ends: 466 [2022-11-20 11:56:33,876 INFO L226 Difference]: Without dead ends: 466 [2022-11-20 11:56:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:56:33,877 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 646 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:33,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 547 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:56:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-20 11:56:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 271. [2022-11-20 11:56:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 168 states have (on average 1.7857142857142858) internal successors, (300), 268 states have internal predecessors, (300), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 316 transitions. [2022-11-20 11:56:33,887 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 316 transitions. Word has length 19 [2022-11-20 11:56:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 316 transitions. [2022-11-20 11:56:33,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 316 transitions. [2022-11-20 11:56:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:56:33,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:33,889 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:56:33,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash -519854938, now seen corresponding path program 1 times [2022-11-20 11:56:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:33,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608621764] [2022-11-20 11:56:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608621764] [2022-11-20 11:56:34,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608621764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:34,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:34,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:56:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638148449] [2022-11-20 11:56:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:34,091 INFO L87 Difference]: Start difference. First operand 271 states and 316 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:34,667 INFO L93 Difference]: Finished difference Result 606 states and 668 transitions. [2022-11-20 11:56:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:56:34,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:56:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:34,671 INFO L225 Difference]: With dead ends: 606 [2022-11-20 11:56:34,671 INFO L226 Difference]: Without dead ends: 606 [2022-11-20 11:56:34,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:56:34,672 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 891 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:34,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 571 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:56:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-20 11:56:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 291. [2022-11-20 11:56:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 188 states have (on average 1.7234042553191489) internal successors, (324), 288 states have internal predecessors, (324), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 340 transitions. [2022-11-20 11:56:34,684 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 340 transitions. Word has length 19 [2022-11-20 11:56:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:34,684 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 340 transitions. [2022-11-20 11:56:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 340 transitions. [2022-11-20 11:56:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:56:34,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:34,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:34,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:56:34,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:34,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1987558854, now seen corresponding path program 1 times [2022-11-20 11:56:34,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:34,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762172713] [2022-11-20 11:56:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:34,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:56:34,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762172713] [2022-11-20 11:56:34,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762172713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:34,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:34,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:56:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116953831] [2022-11-20 11:56:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:34,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:34,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:34,802 INFO L87 Difference]: Start difference. First operand 291 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:35,046 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2022-11-20 11:56:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:56:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 11:56:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:35,049 INFO L225 Difference]: With dead ends: 373 [2022-11-20 11:56:35,049 INFO L226 Difference]: Without dead ends: 373 [2022-11-20 11:56:35,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:56:35,050 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 104 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:35,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 838 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:56:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-20 11:56:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 290. [2022-11-20 11:56:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 188 states have (on average 1.7127659574468086) internal successors, (322), 287 states have internal predecessors, (322), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 337 transitions. [2022-11-20 11:56:35,060 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 337 transitions. Word has length 26 [2022-11-20 11:56:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:35,060 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 337 transitions. [2022-11-20 11:56:35,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 337 transitions. [2022-11-20 11:56:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:56:35,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:35,062 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:56:35,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1626991364, now seen corresponding path program 1 times [2022-11-20 11:56:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149664071] [2022-11-20 11:56:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:56:35,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:35,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149664071] [2022-11-20 11:56:35,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149664071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:35,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:35,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:56:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180144785] [2022-11-20 11:56:35,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:35,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:35,189 INFO L87 Difference]: Start difference. First operand 290 states and 337 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:35,416 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2022-11-20 11:56:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:56:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 11:56:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:35,418 INFO L225 Difference]: With dead ends: 289 [2022-11-20 11:56:35,419 INFO L226 Difference]: Without dead ends: 289 [2022-11-20 11:56:35,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:56:35,420 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 20 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:35,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 863 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:56:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-20 11:56:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-20 11:56:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.702127659574468) internal successors, (320), 286 states have internal predecessors, (320), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 334 transitions. [2022-11-20 11:56:35,429 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 334 transitions. Word has length 26 [2022-11-20 11:56:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:35,429 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 334 transitions. [2022-11-20 11:56:35,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 334 transitions. [2022-11-20 11:56:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:56:35,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:35,431 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:56:35,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1169692160, now seen corresponding path program 1 times [2022-11-20 11:56:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:35,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578788775] [2022-11-20 11:56:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:35,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:35,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578788775] [2022-11-20 11:56:35,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578788775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:35,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:35,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:56:35,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889639244] [2022-11-20 11:56:35,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:35,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:56:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:56:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:56:35,715 INFO L87 Difference]: Start difference. First operand 289 states and 334 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:36,167 INFO L93 Difference]: Finished difference Result 602 states and 659 transitions. [2022-11-20 11:56:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:56:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:56:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:36,170 INFO L225 Difference]: With dead ends: 602 [2022-11-20 11:56:36,170 INFO L226 Difference]: Without dead ends: 602 [2022-11-20 11:56:36,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:56:36,171 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1288 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:36,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1037 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-20 11:56:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 289. [2022-11-20 11:56:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.696808510638298) internal successors, (319), 286 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2022-11-20 11:56:36,180 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 29 [2022-11-20 11:56:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:36,180 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2022-11-20 11:56:36,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2022-11-20 11:56:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:56:36,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:36,181 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:36,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:56:36,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash 698957523, now seen corresponding path program 1 times [2022-11-20 11:56:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:36,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125857192] [2022-11-20 11:56:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:36,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:36,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125857192] [2022-11-20 11:56:36,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125857192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:36,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:36,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:56:36,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970098211] [2022-11-20 11:56:36,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:56:36,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:36,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:56:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:56:36,402 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:36,834 INFO L93 Difference]: Finished difference Result 601 states and 657 transitions. [2022-11-20 11:56:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:56:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:56:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:36,837 INFO L225 Difference]: With dead ends: 601 [2022-11-20 11:56:36,837 INFO L226 Difference]: Without dead ends: 601 [2022-11-20 11:56:36,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:56:36,840 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1284 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:36,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 1037 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-20 11:56:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 289. [2022-11-20 11:56:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.6914893617021276) internal successors, (318), 286 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 332 transitions. [2022-11-20 11:56:36,849 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 332 transitions. Word has length 29 [2022-11-20 11:56:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:36,849 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 332 transitions. [2022-11-20 11:56:36,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 332 transitions. [2022-11-20 11:56:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:56:36,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:36,852 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:56:36,853 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1900933732, now seen corresponding path program 1 times [2022-11-20 11:56:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:36,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808911952] [2022-11-20 11:56:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:37,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:37,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808911952] [2022-11-20 11:56:37,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808911952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:37,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:37,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:56:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025276192] [2022-11-20 11:56:37,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:37,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:56:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:56:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:37,285 INFO L87 Difference]: Start difference. First operand 289 states and 332 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:38,255 INFO L93 Difference]: Finished difference Result 674 states and 745 transitions. [2022-11-20 11:56:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:56:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:56:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:38,260 INFO L225 Difference]: With dead ends: 674 [2022-11-20 11:56:38,260 INFO L226 Difference]: Without dead ends: 674 [2022-11-20 11:56:38,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:56:38,261 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1617 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:38,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 806 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:56:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-20 11:56:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 290. [2022-11-20 11:56:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.693121693121693) internal successors, (320), 287 states have internal predecessors, (320), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2022-11-20 11:56:38,270 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 30 [2022-11-20 11:56:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:38,271 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2022-11-20 11:56:38,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2022-11-20 11:56:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:56:38,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:38,272 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:56:38,272 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1900933731, now seen corresponding path program 1 times [2022-11-20 11:56:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520814680] [2022-11-20 11:56:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:38,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:38,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:38,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520814680] [2022-11-20 11:56:38,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520814680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:38,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:38,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:56:38,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409850156] [2022-11-20 11:56:38,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:38,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:56:38,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:38,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:56:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:38,718 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:40,106 INFO L93 Difference]: Finished difference Result 799 states and 878 transitions. [2022-11-20 11:56:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:56:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:56:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:40,110 INFO L225 Difference]: With dead ends: 799 [2022-11-20 11:56:40,110 INFO L226 Difference]: Without dead ends: 799 [2022-11-20 11:56:40,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:56:40,111 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1784 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:40,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 769 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:56:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-20 11:56:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 290. [2022-11-20 11:56:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.687830687830688) internal successors, (319), 287 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2022-11-20 11:56:40,124 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 30 [2022-11-20 11:56:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:40,126 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2022-11-20 11:56:40,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2022-11-20 11:56:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:56:40,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:40,135 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:40,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:56:40,136 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash 192556862, now seen corresponding path program 1 times [2022-11-20 11:56:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:40,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930965654] [2022-11-20 11:56:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:40,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930965654] [2022-11-20 11:56:40,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930965654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:40,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:40,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:56:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287993522] [2022-11-20 11:56:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:56:40,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:56:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:40,494 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:41,511 INFO L93 Difference]: Finished difference Result 672 states and 743 transitions. [2022-11-20 11:56:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:56:41,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:56:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:41,515 INFO L225 Difference]: With dead ends: 672 [2022-11-20 11:56:41,515 INFO L226 Difference]: Without dead ends: 672 [2022-11-20 11:56:41,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:56:41,516 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1450 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:41,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 981 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:56:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-20 11:56:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 290. [2022-11-20 11:56:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.6825396825396826) internal successors, (318), 287 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2022-11-20 11:56:41,533 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 30 [2022-11-20 11:56:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:41,533 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2022-11-20 11:56:41,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2022-11-20 11:56:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:56:41,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:41,534 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:41,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:56:41,536 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash 192556863, now seen corresponding path program 1 times [2022-11-20 11:56:41,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:41,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788200745] [2022-11-20 11:56:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:41,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788200745] [2022-11-20 11:56:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788200745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:42,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:42,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:56:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81683776] [2022-11-20 11:56:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:42,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:56:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:56:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:42,026 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:43,470 INFO L93 Difference]: Finished difference Result 797 states and 876 transitions. [2022-11-20 11:56:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:56:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:56:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:43,475 INFO L225 Difference]: With dead ends: 797 [2022-11-20 11:56:43,475 INFO L226 Difference]: Without dead ends: 797 [2022-11-20 11:56:43,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:56:43,476 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1643 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:43,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 882 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:56:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-20 11:56:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 290. [2022-11-20 11:56:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.6772486772486772) internal successors, (317), 287 states have internal predecessors, (317), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 331 transitions. [2022-11-20 11:56:43,487 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 331 transitions. Word has length 30 [2022-11-20 11:56:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:43,487 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 331 transitions. [2022-11-20 11:56:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 331 transitions. [2022-11-20 11:56:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:56:43,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:43,489 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:56:43,489 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1572782387, now seen corresponding path program 1 times [2022-11-20 11:56:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:43,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620076062] [2022-11-20 11:56:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:44,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620076062] [2022-11-20 11:56:44,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620076062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:44,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:44,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:56:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843224060] [2022-11-20 11:56:44,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:44,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:56:44,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:56:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:56:44,120 INFO L87 Difference]: Start difference. First operand 290 states and 331 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:45,334 INFO L93 Difference]: Finished difference Result 596 states and 651 transitions. [2022-11-20 11:56:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:56:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 11:56:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:45,337 INFO L225 Difference]: With dead ends: 596 [2022-11-20 11:56:45,338 INFO L226 Difference]: Without dead ends: 596 [2022-11-20 11:56:45,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:56:45,339 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1625 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:45,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 1531 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:56:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-20 11:56:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 291. [2022-11-20 11:56:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 190 states have (on average 1.6736842105263159) internal successors, (318), 288 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-11-20 11:56:45,360 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 33 [2022-11-20 11:56:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:45,360 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-11-20 11:56:45,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-11-20 11:56:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:56:45,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:45,362 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:45,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:56:45,363 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1614681760, now seen corresponding path program 1 times [2022-11-20 11:56:45,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:45,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497774265] [2022-11-20 11:56:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:45,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497774265] [2022-11-20 11:56:45,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497774265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:45,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:45,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:56:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116637954] [2022-11-20 11:56:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:45,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:56:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:56:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:56:45,982 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:47,098 INFO L93 Difference]: Finished difference Result 595 states and 649 transitions. [2022-11-20 11:56:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:56:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 11:56:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:47,100 INFO L225 Difference]: With dead ends: 595 [2022-11-20 11:56:47,100 INFO L226 Difference]: Without dead ends: 595 [2022-11-20 11:56:47,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:56:47,101 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2039 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:47,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2039 Valid, 1374 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:56:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-11-20 11:56:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 291. [2022-11-20 11:56:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 190 states have (on average 1.668421052631579) internal successors, (317), 288 states have internal predecessors, (317), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 331 transitions. [2022-11-20 11:56:47,114 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 331 transitions. Word has length 33 [2022-11-20 11:56:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:47,114 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 331 transitions. [2022-11-20 11:56:47,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 331 transitions. [2022-11-20 11:56:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:56:47,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:47,116 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:47,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:56:47,116 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1234347779, now seen corresponding path program 1 times [2022-11-20 11:56:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985331841] [2022-11-20 11:56:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:47,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985331841] [2022-11-20 11:56:47,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985331841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848712466] [2022-11-20 11:56:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:47,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:56:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:56:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:48,001 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:56:48,008 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:56:48,123 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-20 11:56:48,126 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-20 11:56:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:48,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:48,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848712466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:48,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:48,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 17 [2022-11-20 11:56:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500628431] [2022-11-20 11:56:48,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:48,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:56:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:56:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:56:48,464 INFO L87 Difference]: Start difference. First operand 291 states and 331 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:49,371 INFO L93 Difference]: Finished difference Result 486 states and 543 transitions. [2022-11-20 11:56:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:56:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 11:56:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:49,373 INFO L225 Difference]: With dead ends: 486 [2022-11-20 11:56:49,373 INFO L226 Difference]: Without dead ends: 486 [2022-11-20 11:56:49,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:56:49,375 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 673 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:49,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 2710 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:56:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-20 11:56:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 307. [2022-11-20 11:56:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 206 states have (on average 1.6213592233009708) internal successors, (334), 304 states have internal predecessors, (334), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 348 transitions. [2022-11-20 11:56:49,383 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 348 transitions. Word has length 35 [2022-11-20 11:56:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:49,384 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 348 transitions. [2022-11-20 11:56:49,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 348 transitions. [2022-11-20 11:56:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:56:49,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:49,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:49,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:49,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:56:49,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1275174605, now seen corresponding path program 1 times [2022-11-20 11:56:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:49,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963164989] [2022-11-20 11:56:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:49,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:49,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963164989] [2022-11-20 11:56:49,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963164989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:49,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:49,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:56:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024239881] [2022-11-20 11:56:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:49,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:49,904 INFO L87 Difference]: Start difference. First operand 307 states and 348 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:50,458 INFO L93 Difference]: Finished difference Result 499 states and 544 transitions. [2022-11-20 11:56:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:56:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 11:56:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:50,461 INFO L225 Difference]: With dead ends: 499 [2022-11-20 11:56:50,462 INFO L226 Difference]: Without dead ends: 499 [2022-11-20 11:56:50,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:56:50,463 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 479 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:50,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 609 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:56:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-20 11:56:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 313. [2022-11-20 11:56:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 212 states have (on average 1.6273584905660377) internal successors, (345), 310 states have internal predecessors, (345), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 359 transitions. [2022-11-20 11:56:50,476 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 359 transitions. Word has length 37 [2022-11-20 11:56:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:50,476 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 359 transitions. [2022-11-20 11:56:50,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 359 transitions. [2022-11-20 11:56:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:56:50,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:50,477 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:50,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:56:50,478 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1275174606, now seen corresponding path program 1 times [2022-11-20 11:56:50,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:50,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672087235] [2022-11-20 11:56:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:56:50,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:50,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672087235] [2022-11-20 11:56:50,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672087235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:50,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:50,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:56:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390564188] [2022-11-20 11:56:50,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:50,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:56:50,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:50,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:56:50,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:56:50,607 INFO L87 Difference]: Start difference. First operand 313 states and 359 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:51,235 INFO L93 Difference]: Finished difference Result 632 states and 714 transitions. [2022-11-20 11:56:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:56:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 11:56:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:51,238 INFO L225 Difference]: With dead ends: 632 [2022-11-20 11:56:51,238 INFO L226 Difference]: Without dead ends: 632 [2022-11-20 11:56:51,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:51,239 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 1005 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:51,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 556 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:56:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-20 11:56:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 313. [2022-11-20 11:56:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.6074766355140186) internal successors, (344), 310 states have internal predecessors, (344), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 358 transitions. [2022-11-20 11:56:51,250 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 358 transitions. Word has length 37 [2022-11-20 11:56:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:51,251 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 358 transitions. [2022-11-20 11:56:51,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 358 transitions. [2022-11-20 11:56:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:56:51,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:51,252 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:51,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:56:51,252 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1375067782, now seen corresponding path program 1 times [2022-11-20 11:56:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632694522] [2022-11-20 11:56:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:51,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632694522] [2022-11-20 11:56:51,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632694522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:51,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:51,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:56:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342009387] [2022-11-20 11:56:51,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:56:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:56:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:56:51,351 INFO L87 Difference]: Start difference. First operand 313 states and 358 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:51,485 INFO L93 Difference]: Finished difference Result 426 states and 467 transitions. [2022-11-20 11:56:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:56:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:56:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:51,488 INFO L225 Difference]: With dead ends: 426 [2022-11-20 11:56:51,489 INFO L226 Difference]: Without dead ends: 426 [2022-11-20 11:56:51,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:51,490 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 805 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:51,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 904 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:56:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-20 11:56:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 313. [2022-11-20 11:56:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.602803738317757) internal successors, (343), 310 states have internal predecessors, (343), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 357 transitions. [2022-11-20 11:56:51,498 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 357 transitions. Word has length 39 [2022-11-20 11:56:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:51,499 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 357 transitions. [2022-11-20 11:56:51,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 357 transitions. [2022-11-20 11:56:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:56:51,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:51,500 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 11:56:51,501 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1375068993, now seen corresponding path program 1 times [2022-11-20 11:56:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:51,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025605545] [2022-11-20 11:56:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:51,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:56:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025605545] [2022-11-20 11:56:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025605545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:51,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:51,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:56:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733700404] [2022-11-20 11:56:51,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:51,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:56:51,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:51,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:56:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:56:51,610 INFO L87 Difference]: Start difference. First operand 313 states and 357 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:52,226 INFO L93 Difference]: Finished difference Result 573 states and 644 transitions. [2022-11-20 11:56:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:56:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:56:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:52,229 INFO L225 Difference]: With dead ends: 573 [2022-11-20 11:56:52,230 INFO L226 Difference]: Without dead ends: 573 [2022-11-20 11:56:52,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:56:52,230 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 468 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:52,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 719 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:56:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-20 11:56:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 310. [2022-11-20 11:56:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.574766355140187) internal successors, (337), 307 states have internal predecessors, (337), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 351 transitions. [2022-11-20 11:56:52,242 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 351 transitions. Word has length 39 [2022-11-20 11:56:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:52,242 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 351 transitions. [2022-11-20 11:56:52,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 351 transitions. [2022-11-20 11:56:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:56:52,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:52,243 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:56:52,244 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1375068992, now seen corresponding path program 1 times [2022-11-20 11:56:52,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:52,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369958642] [2022-11-20 11:56:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:52,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369958642] [2022-11-20 11:56:52,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369958642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:52,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:52,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:56:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487957827] [2022-11-20 11:56:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:56:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:56:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:56:52,422 INFO L87 Difference]: Start difference. First operand 310 states and 351 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:52,930 INFO L93 Difference]: Finished difference Result 418 states and 458 transitions. [2022-11-20 11:56:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:56:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:56:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:52,932 INFO L225 Difference]: With dead ends: 418 [2022-11-20 11:56:52,932 INFO L226 Difference]: Without dead ends: 418 [2022-11-20 11:56:52,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:56:52,933 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 356 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:52,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 557 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:56:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-20 11:56:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 310. [2022-11-20 11:56:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.560747663551402) internal successors, (334), 307 states have internal predecessors, (334), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 348 transitions. [2022-11-20 11:56:52,942 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 348 transitions. Word has length 39 [2022-11-20 11:56:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:52,943 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 348 transitions. [2022-11-20 11:56:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 348 transitions. [2022-11-20 11:56:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:56:52,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:52,944 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:56:52,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 11:56:52,945 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1377050303, now seen corresponding path program 1 times [2022-11-20 11:56:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:52,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436259965] [2022-11-20 11:56:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:52,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:53,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436259965] [2022-11-20 11:56:53,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436259965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:53,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:53,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:56:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33578942] [2022-11-20 11:56:53,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:53,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:56:53,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:56:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:56:53,046 INFO L87 Difference]: Start difference. First operand 310 states and 348 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:53,252 INFO L93 Difference]: Finished difference Result 541 states and 594 transitions. [2022-11-20 11:56:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:56:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:56:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:53,255 INFO L225 Difference]: With dead ends: 541 [2022-11-20 11:56:53,255 INFO L226 Difference]: Without dead ends: 541 [2022-11-20 11:56:53,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:56:53,256 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1089 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:53,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 1014 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:56:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-11-20 11:56:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 310. [2022-11-20 11:56:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.5560747663551402) internal successors, (333), 307 states have internal predecessors, (333), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 347 transitions. [2022-11-20 11:56:53,266 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 347 transitions. Word has length 39 [2022-11-20 11:56:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:53,267 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 347 transitions. [2022-11-20 11:56:53,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 347 transitions. [2022-11-20 11:56:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:56:53,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:53,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:53,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 11:56:53,269 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash 718105722, now seen corresponding path program 1 times [2022-11-20 11:56:53,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818334521] [2022-11-20 11:56:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:53,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818334521] [2022-11-20 11:56:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818334521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:53,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779684602] [2022-11-20 11:56:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:53,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:53,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:56:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:56:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:54,146 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:56:54,154 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:56:54,403 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:54,409 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:54,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:54,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779684602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:54,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:54,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 13 [2022-11-20 11:56:54,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804273328] [2022-11-20 11:56:54,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:54,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:56:54,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:54,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:56:54,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:56:54,703 INFO L87 Difference]: Start difference. First operand 310 states and 347 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:55,274 INFO L93 Difference]: Finished difference Result 390 states and 432 transitions. [2022-11-20 11:56:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:56:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-20 11:56:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:55,277 INFO L225 Difference]: With dead ends: 390 [2022-11-20 11:56:55,277 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 11:56:55,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:56:55,278 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 405 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1684 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:56:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 11:56:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2022-11-20 11:56:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 234 states have (on average 1.5128205128205128) internal successors, (354), 327 states have internal predecessors, (354), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 368 transitions. [2022-11-20 11:56:55,288 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 368 transitions. Word has length 42 [2022-11-20 11:56:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:55,289 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 368 transitions. [2022-11-20 11:56:55,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 368 transitions. [2022-11-20 11:56:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:56:55,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:55,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:55,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:55,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:56:55,497 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -551533569, now seen corresponding path program 1 times [2022-11-20 11:56:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:55,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936189944] [2022-11-20 11:56:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:55,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936189944] [2022-11-20 11:56:55,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936189944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:55,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558079595] [2022-11-20 11:56:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:55,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:55,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:55,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:55,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:56:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:56:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:56,217 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:56:56,224 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:56:56,410 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:56,418 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:56,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558079595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:56,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:56,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 12 [2022-11-20 11:56:56,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001387810] [2022-11-20 11:56:56,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:56:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:56:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:56:56,667 INFO L87 Difference]: Start difference. First operand 330 states and 368 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:57,074 INFO L93 Difference]: Finished difference Result 377 states and 417 transitions. [2022-11-20 11:56:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:56:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-20 11:56:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:57,077 INFO L225 Difference]: With dead ends: 377 [2022-11-20 11:56:57,078 INFO L226 Difference]: Without dead ends: 377 [2022-11-20 11:56:57,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:56:57,078 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 264 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:57,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1521 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:56:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-20 11:56:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 330. [2022-11-20 11:56:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 234 states have (on average 1.5085470085470085) internal successors, (353), 327 states have internal predecessors, (353), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 367 transitions. [2022-11-20 11:56:57,087 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 367 transitions. Word has length 41 [2022-11-20 11:56:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:57,088 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 367 transitions. [2022-11-20 11:56:57,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 367 transitions. [2022-11-20 11:56:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:56:57,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:57,089 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:57,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:57,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:57,297 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash -163923031, now seen corresponding path program 1 times [2022-11-20 11:56:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:57,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895278525] [2022-11-20 11:56:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:57,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:57,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:57,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895278525] [2022-11-20 11:56:57,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895278525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:56:57,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:56:57,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:56:57,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382179687] [2022-11-20 11:56:57,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:56:57,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:56:57,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:56:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:56:57,752 INFO L87 Difference]: Start difference. First operand 330 states and 367 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:58,536 INFO L93 Difference]: Finished difference Result 429 states and 465 transitions. [2022-11-20 11:56:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:56:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-20 11:56:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:58,539 INFO L225 Difference]: With dead ends: 429 [2022-11-20 11:56:58,539 INFO L226 Difference]: Without dead ends: 429 [2022-11-20 11:56:58,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:56:58,543 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 930 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:58,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 1724 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:56:58,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-20 11:56:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 342. [2022-11-20 11:56:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 246 states have (on average 1.491869918699187) internal successors, (367), 339 states have internal predecessors, (367), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:56:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 381 transitions. [2022-11-20 11:56:58,553 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 381 transitions. Word has length 45 [2022-11-20 11:56:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 381 transitions. [2022-11-20 11:56:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 381 transitions. [2022-11-20 11:56:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:56:58,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:58,554 INFO L195 NwaCegarLoop]: 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, 1] [2022-11-20 11:56:58,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 11:56:58,555 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:56:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1832676911, now seen corresponding path program 2 times [2022-11-20 11:56:58,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:58,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794820161] [2022-11-20 11:56:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:58,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:59,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794820161] [2022-11-20 11:56:59,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794820161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896554148] [2022-11-20 11:56:59,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:56:59,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:59,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:59,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:56:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:56:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:56:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:59,554 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:59,596 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:56:59,597 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:59,644 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 11:56:59,645 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:56:59,694 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:57:00,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:57:00,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-11-20 11:57:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:00,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:00,368 INFO L350 Elim1Store]: Elim1 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 14 [2022-11-20 11:57:00,376 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 20 [2022-11-20 11:57:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:00,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896554148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:00,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:00,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 24 [2022-11-20 11:57:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919634298] [2022-11-20 11:57:00,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:57:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:57:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:57:00,743 INFO L87 Difference]: Start difference. First operand 342 states and 381 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:03,330 INFO L93 Difference]: Finished difference Result 613 states and 679 transitions. [2022-11-20 11:57:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:57:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 11:57:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:03,333 INFO L225 Difference]: With dead ends: 613 [2022-11-20 11:57:03,334 INFO L226 Difference]: Without dead ends: 613 [2022-11-20 11:57:03,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:57:03,337 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 2480 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2482 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:03,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2482 Valid, 2573 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1932 Invalid, 0 Unknown, 612 Unchecked, 1.8s Time] [2022-11-20 11:57:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-20 11:57:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 344. [2022-11-20 11:57:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 248 states have (on average 1.4919354838709677) internal successors, (370), 341 states have internal predecessors, (370), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 384 transitions. [2022-11-20 11:57:03,361 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 384 transitions. Word has length 46 [2022-11-20 11:57:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:03,361 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 384 transitions. [2022-11-20 11:57:03,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 384 transitions. [2022-11-20 11:57:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:57:03,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:03,363 INFO L195 NwaCegarLoop]: 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, 1] [2022-11-20 11:57:03,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:03,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 11:57:03,570 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1832676912, now seen corresponding path program 1 times [2022-11-20 11:57:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:03,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115921397] [2022-11-20 11:57:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:04,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115921397] [2022-11-20 11:57:04,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115921397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598345210] [2022-11-20 11:57:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:04,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:04,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:04,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:04,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:57:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:57:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:04,888 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:04,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:57:04,979 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:04,993 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:57:04,994 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:05,048 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:57:05,049 INFO L350 Elim1Store]: Elim1 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 18 [2022-11-20 11:57:05,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:05,150 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:57:05,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-20 11:57:05,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:57:05,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-11-20 11:57:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:06,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-11-20 11:57:06,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-20 11:57:06,690 INFO L350 Elim1Store]: Elim1 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 42 [2022-11-20 11:57:06,696 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 58 [2022-11-20 11:57:06,776 INFO L350 Elim1Store]: Elim1 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 14 [2022-11-20 11:57:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:57:07,645 INFO L350 Elim1Store]: Elim1 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 149 treesize of output 143 [2022-11-20 11:57:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:07,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598345210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:07,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:07,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-11-20 11:57:07,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843360662] [2022-11-20 11:57:07,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:07,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:57:07,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:57:07,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:57:07,900 INFO L87 Difference]: Start difference. First operand 344 states and 384 transitions. Second operand has 35 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:12,567 INFO L93 Difference]: Finished difference Result 750 states and 849 transitions. [2022-11-20 11:57:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:57:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 11:57:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:12,571 INFO L225 Difference]: With dead ends: 750 [2022-11-20 11:57:12,571 INFO L226 Difference]: Without dead ends: 750 [2022-11-20 11:57:12,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=715, Invalid=2945, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:57:12,574 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 4780 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4782 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 3682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1439 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:12,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4782 Valid, 3609 Invalid, 3682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2194 Invalid, 0 Unknown, 1439 Unchecked, 2.3s Time] [2022-11-20 11:57:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-20 11:57:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 360. [2022-11-20 11:57:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 267 states have (on average 1.4606741573033708) internal successors, (390), 357 states have internal predecessors, (390), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 404 transitions. [2022-11-20 11:57:12,586 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 404 transitions. Word has length 46 [2022-11-20 11:57:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:12,586 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 404 transitions. [2022-11-20 11:57:12,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 404 transitions. [2022-11-20 11:57:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:57:12,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:12,588 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:12,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 11:57:12,795 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash -56370646, now seen corresponding path program 1 times [2022-11-20 11:57:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:12,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125004379] [2022-11-20 11:57:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:13,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125004379] [2022-11-20 11:57:13,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125004379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:13,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:13,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:57:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301685715] [2022-11-20 11:57:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:13,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:57:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:57:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:57:13,024 INFO L87 Difference]: Start difference. First operand 360 states and 404 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:13,648 INFO L93 Difference]: Finished difference Result 492 states and 546 transitions. [2022-11-20 11:57:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:57:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-20 11:57:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:13,651 INFO L225 Difference]: With dead ends: 492 [2022-11-20 11:57:13,651 INFO L226 Difference]: Without dead ends: 492 [2022-11-20 11:57:13,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:57:13,652 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 275 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1193 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:57:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-20 11:57:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 363. [2022-11-20 11:57:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 272 states have (on average 1.4411764705882353) internal successors, (392), 360 states have internal predecessors, (392), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 406 transitions. [2022-11-20 11:57:13,662 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 406 transitions. Word has length 48 [2022-11-20 11:57:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:13,662 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 406 transitions. [2022-11-20 11:57:13,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 406 transitions. [2022-11-20 11:57:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:57:13,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:13,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:13,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-20 11:57:13,664 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -56370645, now seen corresponding path program 1 times [2022-11-20 11:57:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:13,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656311037] [2022-11-20 11:57:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:14,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656311037] [2022-11-20 11:57:14,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656311037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:14,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:14,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:57:14,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24368567] [2022-11-20 11:57:14,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:14,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:57:14,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:57:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:57:14,167 INFO L87 Difference]: Start difference. First operand 363 states and 406 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:15,273 INFO L93 Difference]: Finished difference Result 469 states and 512 transitions. [2022-11-20 11:57:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:57:15,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-20 11:57:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:15,275 INFO L225 Difference]: With dead ends: 469 [2022-11-20 11:57:15,276 INFO L226 Difference]: Without dead ends: 469 [2022-11-20 11:57:15,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:57:15,277 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 986 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:15,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1552 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:57:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-20 11:57:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 366. [2022-11-20 11:57:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 275 states have (on average 1.4363636363636363) internal successors, (395), 363 states have internal predecessors, (395), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 409 transitions. [2022-11-20 11:57:15,287 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 409 transitions. Word has length 48 [2022-11-20 11:57:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:15,287 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 409 transitions. [2022-11-20 11:57:15,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 409 transitions. [2022-11-20 11:57:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 11:57:15,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:15,289 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:15,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-20 11:57:15,289 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2146523909, now seen corresponding path program 1 times [2022-11-20 11:57:15,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:15,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290653627] [2022-11-20 11:57:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:16,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:16,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290653627] [2022-11-20 11:57:16,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290653627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439710873] [2022-11-20 11:57:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:16,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:16,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:16,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:57:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:57:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:16,475 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 19 [2022-11-20 11:57:16,478 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 13 [2022-11-20 11:57:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:57:16,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:57:16,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439710873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:16,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:16,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2022-11-20 11:57:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956389747] [2022-11-20 11:57:16,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:16,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:57:16,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:57:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:57:16,661 INFO L87 Difference]: Start difference. First operand 366 states and 409 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:17,352 INFO L93 Difference]: Finished difference Result 364 states and 403 transitions. [2022-11-20 11:57:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:57:17,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-20 11:57:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:17,355 INFO L225 Difference]: With dead ends: 364 [2022-11-20 11:57:17,356 INFO L226 Difference]: Without dead ends: 364 [2022-11-20 11:57:17,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:57:17,357 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1674 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:17,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 542 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:57:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-20 11:57:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-11-20 11:57:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 275 states have (on average 1.4218181818181819) internal successors, (391), 361 states have internal predecessors, (391), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 403 transitions. [2022-11-20 11:57:17,366 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 403 transitions. Word has length 50 [2022-11-20 11:57:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:17,366 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 403 transitions. [2022-11-20 11:57:17,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 403 transitions. [2022-11-20 11:57:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:57:17,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:17,368 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:17,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:17,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:57:17,589 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash -755050628, now seen corresponding path program 1 times [2022-11-20 11:57:17,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:17,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599205481] [2022-11-20 11:57:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:17,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:17,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599205481] [2022-11-20 11:57:17,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599205481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:17,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:17,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:57:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488827204] [2022-11-20 11:57:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:17,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:57:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:57:17,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:57:17,709 INFO L87 Difference]: Start difference. First operand 364 states and 403 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:17,878 INFO L93 Difference]: Finished difference Result 363 states and 400 transitions. [2022-11-20 11:57:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:57:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 11:57:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:17,883 INFO L225 Difference]: With dead ends: 363 [2022-11-20 11:57:17,883 INFO L226 Difference]: Without dead ends: 363 [2022-11-20 11:57:17,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:57:17,884 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 27 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:17,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 823 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:57:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-20 11:57:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-11-20 11:57:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 275 states have (on average 1.4145454545454546) internal successors, (389), 360 states have internal predecessors, (389), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 400 transitions. [2022-11-20 11:57:17,901 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 400 transitions. Word has length 53 [2022-11-20 11:57:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:17,901 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 400 transitions. [2022-11-20 11:57:17,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 400 transitions. [2022-11-20 11:57:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:57:17,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:17,903 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:17,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 11:57:17,903 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash -162853312, now seen corresponding path program 1 times [2022-11-20 11:57:17,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:17,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772718411] [2022-11-20 11:57:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:18,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772718411] [2022-11-20 11:57:18,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772718411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:18,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:18,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:57:18,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937794520] [2022-11-20 11:57:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:18,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:57:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:18,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:57:18,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:57:18,334 INFO L87 Difference]: Start difference. First operand 363 states and 400 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:19,001 INFO L93 Difference]: Finished difference Result 480 states and 526 transitions. [2022-11-20 11:57:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:57:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-20 11:57:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:19,005 INFO L225 Difference]: With dead ends: 480 [2022-11-20 11:57:19,005 INFO L226 Difference]: Without dead ends: 480 [2022-11-20 11:57:19,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:57:19,006 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 268 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:19,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1754 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:57:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-20 11:57:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 362. [2022-11-20 11:57:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 274 states have (on average 1.4124087591240877) internal successors, (387), 359 states have internal predecessors, (387), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 398 transitions. [2022-11-20 11:57:19,021 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 398 transitions. Word has length 52 [2022-11-20 11:57:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:19,022 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 398 transitions. [2022-11-20 11:57:19,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 398 transitions. [2022-11-20 11:57:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:57:19,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:19,023 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:19,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-20 11:57:19,024 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1077445880, now seen corresponding path program 2 times [2022-11-20 11:57:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488066583] [2022-11-20 11:57:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488066583] [2022-11-20 11:57:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488066583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435175306] [2022-11-20 11:57:19,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:57:19,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:19,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:19,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:57:20,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:57:20,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:57:20,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:57:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:20,154 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-20 11:57:20,159 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-20 11:57:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:57:20,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:57:20,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435175306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:20,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:57:20,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 18 [2022-11-20 11:57:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726154519] [2022-11-20 11:57:20,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:57:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:57:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:57:20,166 INFO L87 Difference]: Start difference. First operand 362 states and 398 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:20,428 INFO L93 Difference]: Finished difference Result 361 states and 394 transitions. [2022-11-20 11:57:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:57:20,428 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 11:57:20,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:20,430 INFO L225 Difference]: With dead ends: 361 [2022-11-20 11:57:20,431 INFO L226 Difference]: Without dead ends: 361 [2022-11-20 11:57:20,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:57:20,432 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 101 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:20,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 899 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:57:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-20 11:57:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 356. [2022-11-20 11:57:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 269 states have (on average 1.4089219330855018) internal successors, (379), 353 states have internal predecessors, (379), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 389 transitions. [2022-11-20 11:57:20,439 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 389 transitions. Word has length 53 [2022-11-20 11:57:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:20,440 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 389 transitions. [2022-11-20 11:57:20,440 INFO L496 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 389 transitions. [2022-11-20 11:57:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:57:20,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:20,441 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:20,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:20,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 11:57:20,648 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash 914566065, now seen corresponding path program 2 times [2022-11-20 11:57:20,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:20,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704120778] [2022-11-20 11:57:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:20,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:57:21,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:21,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704120778] [2022-11-20 11:57:21,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704120778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:21,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400084892] [2022-11-20 11:57:21,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:57:21,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:21,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:21,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:57:21,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:57:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:57:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:57:21,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:21,745 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-20 11:57:21,749 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-20 11:57:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:57:21,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:57:21,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400084892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:21,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:57:21,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-20 11:57:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388356038] [2022-11-20 11:57:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:21,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:57:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:57:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:57:21,798 INFO L87 Difference]: Start difference. First operand 356 states and 389 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:22,345 INFO L93 Difference]: Finished difference Result 444 states and 481 transitions. [2022-11-20 11:57:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:57:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-20 11:57:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:22,349 INFO L225 Difference]: With dead ends: 444 [2022-11-20 11:57:22,349 INFO L226 Difference]: Without dead ends: 444 [2022-11-20 11:57:22,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:57:22,350 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 190 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:22,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1481 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:57:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-20 11:57:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 360. [2022-11-20 11:57:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 273 states have (on average 1.4029304029304028) internal successors, (383), 357 states have internal predecessors, (383), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 393 transitions. [2022-11-20 11:57:22,359 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 393 transitions. Word has length 52 [2022-11-20 11:57:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:22,360 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 393 transitions. [2022-11-20 11:57:22,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 393 transitions. [2022-11-20 11:57:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:57:22,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:22,361 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:22,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:22,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 11:57:22,568 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1612035677, now seen corresponding path program 1 times [2022-11-20 11:57:22,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:22,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602159297] [2022-11-20 11:57:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:22,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:57:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602159297] [2022-11-20 11:57:22,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602159297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:22,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:22,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:57:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640093170] [2022-11-20 11:57:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:57:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:57:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:57:22,778 INFO L87 Difference]: Start difference. First operand 360 states and 393 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:23,507 INFO L93 Difference]: Finished difference Result 535 states and 583 transitions. [2022-11-20 11:57:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:57:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-20 11:57:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:23,511 INFO L225 Difference]: With dead ends: 535 [2022-11-20 11:57:23,511 INFO L226 Difference]: Without dead ends: 535 [2022-11-20 11:57:23,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:57:23,513 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 662 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:23,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 855 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:57:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-20 11:57:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2022-11-20 11:57:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 276 states have (on average 1.4021739130434783) internal successors, (387), 360 states have internal predecessors, (387), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 397 transitions. [2022-11-20 11:57:23,525 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 397 transitions. Word has length 55 [2022-11-20 11:57:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:23,525 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 397 transitions. [2022-11-20 11:57:23,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 397 transitions. [2022-11-20 11:57:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:57:23,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:23,527 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:23,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-20 11:57:23,528 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1612035676, now seen corresponding path program 1 times [2022-11-20 11:57:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:23,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589438606] [2022-11-20 11:57:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:57:23,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589438606] [2022-11-20 11:57:23,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589438606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:57:23,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:57:23,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:57:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413071211] [2022-11-20 11:57:23,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:57:23,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:57:23,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:23,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:57:23,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:57:23,863 INFO L87 Difference]: Start difference. First operand 363 states and 397 transitions. Second operand has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:24,601 INFO L93 Difference]: Finished difference Result 580 states and 627 transitions. [2022-11-20 11:57:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:57:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-20 11:57:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:24,603 INFO L225 Difference]: With dead ends: 580 [2022-11-20 11:57:24,603 INFO L226 Difference]: Without dead ends: 580 [2022-11-20 11:57:24,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:57:24,604 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 598 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:24,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 878 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:57:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-20 11:57:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 380. [2022-11-20 11:57:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 293 states have (on average 1.4027303754266212) internal successors, (411), 377 states have internal predecessors, (411), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-11-20 11:57:24,614 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 55 [2022-11-20 11:57:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:24,615 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-11-20 11:57:24,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-11-20 11:57:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 11:57:24,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:24,616 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:57:24,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-20 11:57:24,617 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash 874630922, now seen corresponding path program 1 times [2022-11-20 11:57:24,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:24,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86053418] [2022-11-20 11:57:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:24,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:26,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86053418] [2022-11-20 11:57:26,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86053418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980631083] [2022-11-20 11:57:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:26,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:26,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:26,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:26,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:57:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:26,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 11:57:26,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:26,520 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:26,575 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:57:26,591 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 21 [2022-11-20 11:57:26,649 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:57:26,650 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:26,725 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 17 [2022-11-20 11:57:26,748 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 17 [2022-11-20 11:57:26,776 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:57:26,776 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:26,841 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 17 [2022-11-20 11:57:26,857 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 21 [2022-11-20 11:57:26,868 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:57:27,267 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:27,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:27,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-11-20 11:57:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:27,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:27,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:27,930 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-20 11:57:28,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:28,663 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-20 11:57:28,676 INFO L350 Elim1Store]: Elim1 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 65 treesize of output 57 [2022-11-20 11:57:28,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:28,689 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 61 [2022-11-20 11:57:28,707 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 46 [2022-11-20 11:57:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:29,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980631083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:29,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:29,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 18] total 41 [2022-11-20 11:57:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624075835] [2022-11-20 11:57:29,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:57:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:57:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1512, Unknown=6, NotChecked=0, Total=1640 [2022-11-20 11:57:29,039 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:57:32,881 INFO L93 Difference]: Finished difference Result 728 states and 811 transitions. [2022-11-20 11:57:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:57:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 11:57:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:57:32,885 INFO L225 Difference]: With dead ends: 728 [2022-11-20 11:57:32,885 INFO L226 Difference]: Without dead ends: 728 [2022-11-20 11:57:32,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=511, Invalid=2789, Unknown=6, NotChecked=0, Total=3306 [2022-11-20 11:57:32,888 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 1969 mSDsluCounter, 5309 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 5526 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1010 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:57:32,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1971 Valid, 5526 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1904 Invalid, 0 Unknown, 1010 Unchecked, 1.7s Time] [2022-11-20 11:57:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-20 11:57:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 380. [2022-11-20 11:57:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 293 states have (on average 1.3993174061433447) internal successors, (410), 377 states have internal predecessors, (410), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:57:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 420 transitions. [2022-11-20 11:57:32,899 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 420 transitions. Word has length 56 [2022-11-20 11:57:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:57:32,899 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 420 transitions. [2022-11-20 11:57:32,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:57:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 420 transitions. [2022-11-20 11:57:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 11:57:32,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:57:32,901 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:57:32,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:57:33,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:33,108 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:57:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:57:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1551686691, now seen corresponding path program 1 times [2022-11-20 11:57:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:57:33,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999813316] [2022-11-20 11:57:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:34,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:57:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999813316] [2022-11-20 11:57:34,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999813316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:57:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359589138] [2022-11-20 11:57:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:57:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:57:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:57:34,627 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:57:34,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:57:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:57:34,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 11:57:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:57:34,953 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:35,025 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:57:35,031 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:57:35,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:57:35,183 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:35,273 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 11:57:35,283 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 11:57:35,314 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 11:57:35,323 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 11:57:35,353 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:57:35,353 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:35,362 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:35,458 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 11:57:35,468 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 11:57:35,497 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:57:35,508 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2022-11-20 11:57:35,797 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:57:36,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:57:36,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:57:36,561 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-20 11:57:36,561 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 61 treesize of output 36 [2022-11-20 11:57:36,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:57:36,578 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:57:36,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2022-11-20 11:57:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:36,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:57:41,860 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2022-11-20 11:57:41,860 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 73 [2022-11-20 11:57:41,869 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 96 [2022-11-20 11:57:42,216 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2022-11-20 11:57:42,216 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 91 [2022-11-20 11:57:42,226 INFO L350 Elim1Store]: Elim1 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 86 treesize of output 78 [2022-11-20 11:57:50,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:50,119 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2022-11-20 11:57:50,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:50,138 INFO L350 Elim1Store]: Elim1 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 269 treesize of output 247 [2022-11-20 11:57:50,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:50,164 INFO L350 Elim1Store]: Elim1 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 235 treesize of output 227 [2022-11-20 11:57:50,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:50,200 INFO L350 Elim1Store]: Elim1 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 225 treesize of output 215 [2022-11-20 11:57:50,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:50,742 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-20 11:57:50,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 58 [2022-11-20 11:57:50,758 INFO L350 Elim1Store]: Elim1 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 24 [2022-11-20 11:57:50,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:57:50,773 INFO L350 Elim1Store]: Elim1 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 56 treesize of output 54 [2022-11-20 11:57:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:57:51,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359589138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:57:51,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:57:51,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 19] total 50 [2022-11-20 11:57:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032728420] [2022-11-20 11:57:51,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:57:51,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:57:51,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:57:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:57:51,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2315, Unknown=6, NotChecked=0, Total=2450 [2022-11-20 11:57:51,652 INFO L87 Difference]: Start difference. First operand 380 states and 420 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:58:02,142 INFO L93 Difference]: Finished difference Result 799 states and 876 transitions. [2022-11-20 11:58:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:58:02,143 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 11:58:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:58:02,147 INFO L225 Difference]: With dead ends: 799 [2022-11-20 11:58:02,147 INFO L226 Difference]: Without dead ends: 795 [2022-11-20 11:58:02,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=682, Invalid=6452, Unknown=6, NotChecked=0, Total=7140 [2022-11-20 11:58:02,149 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 2796 mSDsluCounter, 7802 mSDsCounter, 0 mSdLazyCounter, 2888 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 8066 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2000 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:58:02,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 8066 Invalid, 4960 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [72 Valid, 2888 Invalid, 0 Unknown, 2000 Unchecked, 3.1s Time] [2022-11-20 11:58:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-11-20 11:58:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 412. [2022-11-20 11:58:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 325 states have (on average 1.363076923076923) internal successors, (443), 409 states have internal predecessors, (443), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:58:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 453 transitions. [2022-11-20 11:58:02,161 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 453 transitions. Word has length 56 [2022-11-20 11:58:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:58:02,161 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 453 transitions. [2022-11-20 11:58:02,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 453 transitions. [2022-11-20 11:58:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 11:58:02,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:58:02,163 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:58:02,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:58:02,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:02,370 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:58:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1125924296, now seen corresponding path program 1 times [2022-11-20 11:58:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:02,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870954014] [2022-11-20 11:58:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:02,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870954014] [2022-11-20 11:58:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870954014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:58:02,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:58:02,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:58:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847643191] [2022-11-20 11:58:02,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:58:02,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:58:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:58:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:58:02,451 INFO L87 Difference]: Start difference. First operand 412 states and 453 transitions. Second operand has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:58:02,604 INFO L93 Difference]: Finished difference Result 521 states and 573 transitions. [2022-11-20 11:58:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:58:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-20 11:58:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:58:02,607 INFO L225 Difference]: With dead ends: 521 [2022-11-20 11:58:02,607 INFO L226 Difference]: Without dead ends: 521 [2022-11-20 11:58:02,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:58:02,608 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 379 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:58:02,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 490 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:58:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-20 11:58:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 425. [2022-11-20 11:58:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 338 states have (on average 1.363905325443787) internal successors, (461), 422 states have internal predecessors, (461), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:58:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-11-20 11:58:02,620 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 57 [2022-11-20 11:58:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:58:02,620 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-11-20 11:58:02,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-11-20 11:58:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 11:58:02,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:58:02,625 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:58:02,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-20 11:58:02,626 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:58:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1343539666, now seen corresponding path program 1 times [2022-11-20 11:58:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:02,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183987239] [2022-11-20 11:58:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183987239] [2022-11-20 11:58:04,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183987239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:58:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112155288] [2022-11-20 11:58:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:04,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:58:04,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:58:04,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:58:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-20 11:58:04,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:58:04,634 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:04,697 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:58:04,697 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 21 [2022-11-20 11:58:04,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-20 11:58:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:58:04,855 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 26 [2022-11-20 11:58:04,982 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 11:58:04,983 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 41 [2022-11-20 11:58:05,102 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 30 [2022-11-20 11:58:05,165 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 30 [2022-11-20 11:58:05,331 INFO L321 Elim1Store]: treesize reduction 38, result has 48.6 percent of original size [2022-11-20 11:58:05,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 50 [2022-11-20 11:58:05,567 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:58:05,568 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 64 treesize of output 62 [2022-11-20 11:58:05,595 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 38 [2022-11-20 11:58:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:58:05,867 INFO L350 Elim1Store]: Elim1 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 99 treesize of output 82 [2022-11-20 11:58:05,926 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 11:58:08,209 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:09,409 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:58:09,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 40 [2022-11-20 11:58:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:09,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:58:10,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:10,906 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2022-11-20 11:58:13,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:13,937 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 56 [2022-11-20 11:58:13,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 324 treesize of output 300 [2022-11-20 11:58:13,960 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 212 treesize of output 200 [2022-11-20 11:58:13,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:13,988 INFO L350 Elim1Store]: Elim1 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 290 treesize of output 280 [2022-11-20 11:58:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:20,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112155288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:58:20,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:58:20,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 54 [2022-11-20 11:58:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074338273] [2022-11-20 11:58:20,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:58:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:58:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:58:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:58:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2767, Unknown=9, NotChecked=0, Total=2970 [2022-11-20 11:58:20,391 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:58:26,929 INFO L93 Difference]: Finished difference Result 607 states and 682 transitions. [2022-11-20 11:58:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:58:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-20 11:58:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:58:26,932 INFO L225 Difference]: With dead ends: 607 [2022-11-20 11:58:26,932 INFO L226 Difference]: Without dead ends: 607 [2022-11-20 11:58:26,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=593, Invalid=4800, Unknown=9, NotChecked=0, Total=5402 [2022-11-20 11:58:26,933 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1479 mSDsluCounter, 4389 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 4567 SdHoareTripleChecker+Invalid, 3521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1260 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:58:26,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 4567 Invalid, 3521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2188 Invalid, 0 Unknown, 1260 Unchecked, 2.3s Time] [2022-11-20 11:58:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-20 11:58:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 426. [2022-11-20 11:58:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 339 states have (on average 1.3657817109144543) internal successors, (463), 423 states have internal predecessors, (463), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:58:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 473 transitions. [2022-11-20 11:58:26,943 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 473 transitions. Word has length 57 [2022-11-20 11:58:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:58:26,943 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 473 transitions. [2022-11-20 11:58:26,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 55 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:58:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 473 transitions. [2022-11-20 11:58:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 11:58:26,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:58:26,944 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:58:26,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:58:27,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:27,147 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:58:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:58:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1343539667, now seen corresponding path program 1 times [2022-11-20 11:58:27,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:58:27,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780259636] [2022-11-20 11:58:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:27,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:58:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:29,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:58:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780259636] [2022-11-20 11:58:29,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780259636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:58:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850122741] [2022-11-20 11:58:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:58:29,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:58:29,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:58:29,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:58:29,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:58:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:58:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-20 11:58:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:58:29,767 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:29,888 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:58:29,889 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:29,903 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 11:58:29,989 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:30,005 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:58:30,074 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 31 [2022-11-20 11:58:30,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:58:30,089 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-20 11:58:30,217 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 11:58:30,219 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-20 11:58:30,267 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 11:58:30,268 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:30,382 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 11:58:30,392 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 37 [2022-11-20 11:58:30,456 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 37 [2022-11-20 11:58:30,471 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 11:58:30,530 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 11:58:30,531 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-20 11:58:30,560 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-20 11:58:30,560 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:58:30,663 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 30 [2022-11-20 11:58:30,678 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 11:58:30,698 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 30 [2022-11-20 11:58:30,706 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-11-20 11:58:32,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:32,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 45 [2022-11-20 11:58:32,286 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:58:32,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 11:58:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:58:32,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:58:33,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:33,579 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-11-20 11:58:33,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:33,590 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-11-20 11:58:33,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:33,612 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 11:58:40,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:58:40,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:40,687 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2022-11-20 11:58:40,698 INFO L350 Elim1Store]: Elim1 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 192 treesize of output 184 [2022-11-20 11:58:40,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:58:40,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:40,726 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 146 [2022-11-20 11:58:40,742 INFO L350 Elim1Store]: Elim1 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 430 treesize of output 410 [2022-11-20 11:58:40,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:40,767 INFO L350 Elim1Store]: Elim1 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 412 treesize of output 402 [2022-11-20 11:58:40,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:40,793 INFO L350 Elim1Store]: Elim1 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 396 treesize of output 386 [2022-11-20 11:58:40,806 INFO L350 Elim1Store]: Elim1 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 374 treesize of output 366 [2022-11-20 11:58:40,835 INFO L350 Elim1Store]: Elim1 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 186 treesize of output 178 [2022-11-20 11:58:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:58:43,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:43,547 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2022-11-20 11:58:43,554 INFO L350 Elim1Store]: Elim1 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 60 treesize of output 52 [2022-11-20 11:58:43,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:58:43,567 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 56 [2022-11-20 11:58:43,575 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2022-11-20 11:58:57,858 WARN L233 SmtUtils]: Spent 12.89s on a formula simplification. DAG size of input: 222 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:59:04,376 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:59:04,403 INFO L350 Elim1Store]: Elim1 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 305 treesize of output 299 [2022-11-20 11:59:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:06,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850122741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:59:06,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:59:06,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 19] total 51 [2022-11-20 11:59:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865866162] [2022-11-20 11:59:06,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:59:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:59:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:59:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:59:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2473, Unknown=5, NotChecked=0, Total=2652 [2022-11-20 11:59:06,744 INFO L87 Difference]: Start difference. First operand 426 states and 473 transitions. Second operand has 52 states, 51 states have (on average 3.235294117647059) internal successors, (165), 52 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:59:21,051 INFO L93 Difference]: Finished difference Result 750 states and 833 transitions. [2022-11-20 11:59:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:59:21,055 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.235294117647059) internal successors, (165), 52 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-20 11:59:21,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:59:21,058 INFO L225 Difference]: With dead ends: 750 [2022-11-20 11:59:21,059 INFO L226 Difference]: Without dead ends: 750 [2022-11-20 11:59:21,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=993, Invalid=5322, Unknown=5, NotChecked=0, Total=6320 [2022-11-20 11:59:21,061 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 2653 mSDsluCounter, 3576 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2653 SdHoareTripleChecker+Valid, 3755 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1514 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:59:21,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2653 Valid, 3755 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2550 Invalid, 0 Unknown, 1514 Unchecked, 3.2s Time] [2022-11-20 11:59:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-20 11:59:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 426. [2022-11-20 11:59:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 339 states have (on average 1.3628318584070795) internal successors, (462), 423 states have internal predecessors, (462), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:59:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 472 transitions. [2022-11-20 11:59:21,072 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 472 transitions. Word has length 57 [2022-11-20 11:59:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:59:21,072 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 472 transitions. [2022-11-20 11:59:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.235294117647059) internal successors, (165), 52 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 472 transitions. [2022-11-20 11:59:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:59:21,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:59:21,074 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:59:21,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:59:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 11:59:21,281 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:59:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:59:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2019740316, now seen corresponding path program 1 times [2022-11-20 11:59:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:59:21,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969031334] [2022-11-20 11:59:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:21,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:59:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:59:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:59:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:59:21,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969031334] [2022-11-20 11:59:21,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969031334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:59:21,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:59:21,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:59:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294705341] [2022-11-20 11:59:21,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:59:21,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:59:21,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:59:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:59:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:59:21,498 INFO L87 Difference]: Start difference. First operand 426 states and 472 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:59:22,242 INFO L93 Difference]: Finished difference Result 1017 states and 1115 transitions. [2022-11-20 11:59:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:59:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 11:59:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:59:22,247 INFO L225 Difference]: With dead ends: 1017 [2022-11-20 11:59:22,247 INFO L226 Difference]: Without dead ends: 1017 [2022-11-20 11:59:22,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:59:22,248 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1805 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:59:22,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 2458 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:59:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-11-20 11:59:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 479. [2022-11-20 11:59:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 390 states have (on average 1.4256410256410257) internal successors, (556), 476 states have internal predecessors, (556), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:59:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 570 transitions. [2022-11-20 11:59:22,269 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 570 transitions. Word has length 60 [2022-11-20 11:59:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:59:22,270 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 570 transitions. [2022-11-20 11:59:22,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:59:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 570 transitions. [2022-11-20 11:59:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:59:22,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:59:22,272 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:59:22,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-20 11:59:22,273 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 11:59:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:59:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash 590188247, now seen corresponding path program 1 times [2022-11-20 11:59:22,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:59:22,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703073212] [2022-11-20 11:59:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:59:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:59:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:26,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:59:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703073212] [2022-11-20 11:59:26,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703073212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:59:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817510452] [2022-11-20 11:59:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:59:26,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:59:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:59:26,051 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:59:26,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:59:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:59:26,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-20 11:59:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:59:26,359 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:59:26,377 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:59:26,383 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:59:26,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:59:26,412 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-20 11:59:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:59:26,420 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-20 11:59:26,459 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:59:26,460 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:59:26,581 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:59:26,594 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2022-11-20 11:59:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:59:26,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-11-20 11:59:26,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:59:26,637 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:59:26,638 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 53 treesize of output 46 [2022-11-20 11:59:26,866 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 11:59:26,867 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:59:27,056 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:59:27,056 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 62 [2022-11-20 11:59:27,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-20 11:59:27,154 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:59:27,154 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 62 [2022-11-20 11:59:27,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-20 11:59:27,224 INFO L321 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2022-11-20 11:59:27,224 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 29 [2022-11-20 11:59:27,415 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-20 11:59:27,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 55 [2022-11-20 11:59:27,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-20 11:59:27,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:59:27,577 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 11:59:27,578 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 72 [2022-11-20 11:59:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:59:27,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2022-11-20 11:59:29,835 INFO L321 Elim1Store]: treesize reduction 97, result has 10.2 percent of original size [2022-11-20 11:59:29,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 168 treesize of output 86 [2022-11-20 11:59:29,858 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-20 11:59:29,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2022-11-20 11:59:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:59:29,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:59:30,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:59:30,609 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-20 11:59:30,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:59:30,623 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2022-11-20 12:00:02,536 INFO L321 Elim1Store]: treesize reduction 114, result has 28.3 percent of original size [2022-11-20 12:00:02,537 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 163 [2022-11-20 12:00:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:02,665 INFO L321 Elim1Store]: treesize reduction 119, result has 25.2 percent of original size [2022-11-20 12:00:02,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 84 [2022-11-20 12:00:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:02,699 INFO L321 Elim1Store]: treesize reduction 72, result has 5.3 percent of original size [2022-11-20 12:00:02,700 INFO L350 Elim1Store]: Elim1 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 508 treesize of output 426 [2022-11-20 12:00:02,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:02,725 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 12:00:02,726 INFO L350 Elim1Store]: Elim1 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 183 treesize of output 119 [2022-11-20 12:00:02,740 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-20 12:00:02,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:00:02,762 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 106 [2022-11-20 12:00:03,247 INFO L321 Elim1Store]: treesize reduction 109, result has 31.4 percent of original size [2022-11-20 12:00:03,247 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 253 [2022-11-20 12:00:03,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,392 INFO L321 Elim1Store]: treesize reduction 95, result has 40.3 percent of original size [2022-11-20 12:00:03,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 119 [2022-11-20 12:00:03,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,439 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-11-20 12:00:03,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 91 treesize of output 81 [2022-11-20 12:00:03,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:03,508 INFO L321 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-11-20 12:00:03,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 151 treesize of output 149 [2022-11-20 12:00:03,529 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 34 [2022-11-20 12:00:03,624 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 36 [2022-11-20 12:00:03,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:00:03,678 INFO L350 Elim1Store]: Elim1 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 96 treesize of output 96 [2022-11-20 12:00:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:10,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817510452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:10,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:10,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 21] total 52 [2022-11-20 12:00:10,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933726693] [2022-11-20 12:00:10,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:10,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:00:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:00:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2458, Unknown=20, NotChecked=0, Total=2652 [2022-11-20 12:00:10,490 INFO L87 Difference]: Start difference. First operand 479 states and 570 transitions. Second operand has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:22,643 INFO L93 Difference]: Finished difference Result 554 states and 645 transitions. [2022-11-20 12:00:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:00:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 12:00:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:22,646 INFO L225 Difference]: With dead ends: 554 [2022-11-20 12:00:22,646 INFO L226 Difference]: Without dead ends: 554 [2022-11-20 12:00:22,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=716, Invalid=4376, Unknown=20, NotChecked=0, Total=5112 [2022-11-20 12:00:22,649 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1396 mSDsluCounter, 6091 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 6334 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1277 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:22,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 6334 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1914 Invalid, 0 Unknown, 1277 Unchecked, 2.8s Time] [2022-11-20 12:00:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-20 12:00:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 480. [2022-11-20 12:00:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 391 states have (on average 1.4245524296675192) internal successors, (557), 477 states have internal predecessors, (557), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 571 transitions. [2022-11-20 12:00:22,659 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 571 transitions. Word has length 60 [2022-11-20 12:00:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:22,659 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 571 transitions. [2022-11-20 12:00:22,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 571 transitions. [2022-11-20 12:00:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 12:00:22,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:22,661 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:22,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 12:00:22,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 12:00:22,869 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1283333183, now seen corresponding path program 1 times [2022-11-20 12:00:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:22,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173950463] [2022-11-20 12:00:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:23,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:23,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173950463] [2022-11-20 12:00:23,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173950463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:00:23,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:00:23,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:00:23,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319482262] [2022-11-20 12:00:23,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:00:23,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:00:23,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:00:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:00:23,384 INFO L87 Difference]: Start difference. First operand 480 states and 571 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:24,861 INFO L93 Difference]: Finished difference Result 609 states and 697 transitions. [2022-11-20 12:00:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:00:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 12:00:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:24,865 INFO L225 Difference]: With dead ends: 609 [2022-11-20 12:00:24,865 INFO L226 Difference]: Without dead ends: 609 [2022-11-20 12:00:24,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:00:24,866 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1092 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:24,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1190 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:00:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-11-20 12:00:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 489. [2022-11-20 12:00:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 401 states have (on average 1.4164588528678304) internal successors, (568), 486 states have internal predecessors, (568), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 582 transitions. [2022-11-20 12:00:24,876 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 582 transitions. Word has length 60 [2022-11-20 12:00:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:24,877 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 582 transitions. [2022-11-20 12:00:24,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 582 transitions. [2022-11-20 12:00:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 12:00:24,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:24,879 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:24,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-20 12:00:24,879 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr85REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1283333182, now seen corresponding path program 1 times [2022-11-20 12:00:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414547102] [2022-11-20 12:00:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:25,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414547102] [2022-11-20 12:00:25,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414547102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:00:25,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:00:25,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:00:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930725855] [2022-11-20 12:00:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:00:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:00:25,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:00:25,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:00:25,338 INFO L87 Difference]: Start difference. First operand 489 states and 582 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:26,343 INFO L93 Difference]: Finished difference Result 543 states and 631 transitions. [2022-11-20 12:00:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:00:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 12:00:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:26,346 INFO L225 Difference]: With dead ends: 543 [2022-11-20 12:00:26,346 INFO L226 Difference]: Without dead ends: 543 [2022-11-20 12:00:26,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:00:26,347 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 745 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:26,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1228 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:00:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-20 12:00:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 491. [2022-11-20 12:00:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 403 states have (on average 1.411910669975186) internal successors, (569), 488 states have internal predecessors, (569), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 583 transitions. [2022-11-20 12:00:26,358 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 583 transitions. Word has length 60 [2022-11-20 12:00:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:26,358 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 583 transitions. [2022-11-20 12:00:26,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 583 transitions. [2022-11-20 12:00:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 12:00:26,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:26,360 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:26,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-20 12:00:26,361 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:26,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2019739106, now seen corresponding path program 1 times [2022-11-20 12:00:26,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574346389] [2022-11-20 12:00:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:00:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:26,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574346389] [2022-11-20 12:00:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574346389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:00:26,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:00:26,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:00:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312815460] [2022-11-20 12:00:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:00:26,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:00:26,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:00:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:00:26,639 INFO L87 Difference]: Start difference. First operand 491 states and 583 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:27,549 INFO L93 Difference]: Finished difference Result 535 states and 616 transitions. [2022-11-20 12:00:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:00:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 12:00:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:27,553 INFO L225 Difference]: With dead ends: 535 [2022-11-20 12:00:27,553 INFO L226 Difference]: Without dead ends: 535 [2022-11-20 12:00:27,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:00:27,553 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 427 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:27,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 950 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:00:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-20 12:00:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 491. [2022-11-20 12:00:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 403 states have (on average 1.4044665012406947) internal successors, (566), 488 states have internal predecessors, (566), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 580 transitions. [2022-11-20 12:00:27,563 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 580 transitions. Word has length 60 [2022-11-20 12:00:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:27,564 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 580 transitions. [2022-11-20 12:00:27,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 580 transitions. [2022-11-20 12:00:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 12:00:27,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:27,566 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:27,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-20 12:00:27,566 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1128624014, now seen corresponding path program 1 times [2022-11-20 12:00:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:27,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633233125] [2022-11-20 12:00:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633233125] [2022-11-20 12:00:27,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633233125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:00:27,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:00:27,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:00:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106150224] [2022-11-20 12:00:27,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:00:27,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:00:27,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:00:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:00:27,926 INFO L87 Difference]: Start difference. First operand 491 states and 580 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:28,763 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2022-11-20 12:00:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:00:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-20 12:00:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:28,765 INFO L225 Difference]: With dead ends: 540 [2022-11-20 12:00:28,766 INFO L226 Difference]: Without dead ends: 540 [2022-11-20 12:00:28,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:00:28,767 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 718 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:28,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 1800 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:00:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-20 12:00:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 491. [2022-11-20 12:00:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 403 states have (on average 1.401985111662531) internal successors, (565), 488 states have internal predecessors, (565), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 579 transitions. [2022-11-20 12:00:28,777 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 579 transitions. Word has length 61 [2022-11-20 12:00:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:28,777 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 579 transitions. [2022-11-20 12:00:28,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 579 transitions. [2022-11-20 12:00:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 12:00:28,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:28,779 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:28,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-20 12:00:28,780 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1978870945, now seen corresponding path program 1 times [2022-11-20 12:00:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:28,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234210014] [2022-11-20 12:00:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:00:29,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234210014] [2022-11-20 12:00:29,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234210014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587491404] [2022-11-20 12:00:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:29,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:29,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:29,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:00:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 12:00:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:29,860 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:00:29,985 INFO L350 Elim1Store]: Elim1 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 8 [2022-11-20 12:00:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:00:30,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:00:30,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587491404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:30,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:30,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-11-20 12:00:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393846674] [2022-11-20 12:00:30,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:30,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:00:30,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:00:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:00:30,314 INFO L87 Difference]: Start difference. First operand 491 states and 579 transitions. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:31,761 INFO L93 Difference]: Finished difference Result 640 states and 766 transitions. [2022-11-20 12:00:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:00:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-20 12:00:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:31,763 INFO L225 Difference]: With dead ends: 640 [2022-11-20 12:00:31,763 INFO L226 Difference]: Without dead ends: 640 [2022-11-20 12:00:31,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:00:31,765 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 2667 mSDsluCounter, 2288 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:31,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 2532 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:00:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-20 12:00:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 472. [2022-11-20 12:00:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 384 states have (on average 1.4140625) internal successors, (543), 469 states have internal predecessors, (543), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 557 transitions. [2022-11-20 12:00:31,774 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 557 transitions. Word has length 62 [2022-11-20 12:00:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:31,774 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 557 transitions. [2022-11-20 12:00:31,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 557 transitions. [2022-11-20 12:00:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 12:00:31,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:31,776 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:31,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:00:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-20 12:00:31,984 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2020513782, now seen corresponding path program 1 times [2022-11-20 12:00:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503158779] [2022-11-20 12:00:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503158779] [2022-11-20 12:00:32,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503158779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:00:32,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:00:32,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:00:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396648554] [2022-11-20 12:00:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:00:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:00:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:00:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:00:32,261 INFO L87 Difference]: Start difference. First operand 472 states and 557 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:32,933 INFO L93 Difference]: Finished difference Result 529 states and 611 transitions. [2022-11-20 12:00:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:00:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-20 12:00:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:32,936 INFO L225 Difference]: With dead ends: 529 [2022-11-20 12:00:32,936 INFO L226 Difference]: Without dead ends: 529 [2022-11-20 12:00:32,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:00:32,937 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 747 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:32,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 889 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:00:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-20 12:00:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 478. [2022-11-20 12:00:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 390 states have (on average 1.417948717948718) internal successors, (553), 475 states have internal predecessors, (553), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 567 transitions. [2022-11-20 12:00:32,948 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 567 transitions. Word has length 63 [2022-11-20 12:00:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:32,949 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 567 transitions. [2022-11-20 12:00:32,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 567 transitions. [2022-11-20 12:00:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 12:00:32,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:32,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:32,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-20 12:00:32,951 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -840009178, now seen corresponding path program 1 times [2022-11-20 12:00:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754341926] [2022-11-20 12:00:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:32,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:33,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754341926] [2022-11-20 12:00:33,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754341926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434778678] [2022-11-20 12:00:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:33,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:33,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:33,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:33,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:00:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 12:00:33,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:34,720 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-20 12:00:34,720 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 47 [2022-11-20 12:00:34,742 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-11-20 12:00:34,742 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 28 [2022-11-20 12:00:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:00:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:36,115 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-20 12:00:36,116 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 133 [2022-11-20 12:00:36,180 INFO L321 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2022-11-20 12:00:36,181 INFO L350 Elim1Store]: Elim1 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 106 treesize of output 100 [2022-11-20 12:00:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:00:36,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434778678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:36,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:36,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2022-11-20 12:00:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551176863] [2022-11-20 12:00:36,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:00:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:00:36,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:00:36,716 INFO L87 Difference]: Start difference. First operand 478 states and 567 transitions. Second operand has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:38,473 INFO L93 Difference]: Finished difference Result 502 states and 587 transitions. [2022-11-20 12:00:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:00:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-20 12:00:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:38,475 INFO L225 Difference]: With dead ends: 502 [2022-11-20 12:00:38,475 INFO L226 Difference]: Without dead ends: 502 [2022-11-20 12:00:38,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 12:00:38,476 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 668 mSDsluCounter, 3686 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:38,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 3885 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1118 Invalid, 0 Unknown, 168 Unchecked, 1.2s Time] [2022-11-20 12:00:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-11-20 12:00:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 481. [2022-11-20 12:00:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 393 states have (on average 1.4147582697201018) internal successors, (556), 478 states have internal predecessors, (556), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 570 transitions. [2022-11-20 12:00:38,486 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 570 transitions. Word has length 66 [2022-11-20 12:00:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:38,486 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 570 transitions. [2022-11-20 12:00:38,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 570 transitions. [2022-11-20 12:00:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:00:38,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:38,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:38,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:00:38,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 12:00:38,696 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash -270481747, now seen corresponding path program 1 times [2022-11-20 12:00:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:38,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795258418] [2022-11-20 12:00:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795258418] [2022-11-20 12:00:39,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795258418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621541193] [2022-11-20 12:00:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:39,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:39,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:39,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:39,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:00:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:00:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:39,825 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:00:39,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 18 treesize of output 32 [2022-11-20 12:00:39,894 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:00:39,942 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 33 [2022-11-20 12:00:40,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:00:40,390 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 30 [2022-11-20 12:00:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:40,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:42,114 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 43 [2022-11-20 12:00:42,119 INFO L350 Elim1Store]: Elim1 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 168 treesize of output 164 [2022-11-20 12:00:48,869 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 65 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:00:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:49,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621541193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:49,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:49,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-11-20 12:00:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225647417] [2022-11-20 12:00:49,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:49,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:00:49,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:00:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:00:49,178 INFO L87 Difference]: Start difference. First operand 481 states and 570 transitions. Second operand has 32 states, 31 states have (on average 5.967741935483871) internal successors, (185), 32 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:00:51,865 INFO L93 Difference]: Finished difference Result 483 states and 571 transitions. [2022-11-20 12:00:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:00:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.967741935483871) internal successors, (185), 32 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 12:00:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:00:51,867 INFO L225 Difference]: With dead ends: 483 [2022-11-20 12:00:51,868 INFO L226 Difference]: Without dead ends: 431 [2022-11-20 12:00:51,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 12:00:51,869 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 152 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 669 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:00:51,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 3182 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1086 Invalid, 0 Unknown, 669 Unchecked, 1.2s Time] [2022-11-20 12:00:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-20 12:00:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-11-20 12:00:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 343 states have (on average 1.4723032069970845) internal successors, (505), 428 states have internal predecessors, (505), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:00:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 519 transitions. [2022-11-20 12:00:51,877 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 519 transitions. Word has length 67 [2022-11-20 12:00:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:00:51,877 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 519 transitions. [2022-11-20 12:00:51,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.967741935483871) internal successors, (185), 32 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:00:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 519 transitions. [2022-11-20 12:00:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:00:51,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:00:51,879 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:00:51,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:00:52,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:52,086 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:00:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:00:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -513218039, now seen corresponding path program 1 times [2022-11-20 12:00:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:00:52,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121442466] [2022-11-20 12:00:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:52,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:00:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:00:53,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121442466] [2022-11-20 12:00:53,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121442466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:00:53,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197443335] [2022-11-20 12:00:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:00:53,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:00:53,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:00:53,179 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:00:53,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:00:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:00:53,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 12:00:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:00:53,613 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:00:53,621 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:00:54,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:54,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-20 12:00:54,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:00:54,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:00:54,233 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 12 [2022-11-20 12:00:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:00:54,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:00:54,782 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 39 [2022-11-20 12:00:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:00:55,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197443335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:00:55,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:00:55,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 44 [2022-11-20 12:00:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203620618] [2022-11-20 12:00:55,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:00:55,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:00:55,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:00:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:00:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:00:55,636 INFO L87 Difference]: Start difference. First operand 431 states and 519 transitions. Second operand has 45 states, 44 states have (on average 4.386363636363637) internal successors, (193), 45 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:01,188 INFO L93 Difference]: Finished difference Result 806 states and 924 transitions. [2022-11-20 12:01:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 12:01:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.386363636363637) internal successors, (193), 45 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 12:01:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:01,190 INFO L225 Difference]: With dead ends: 806 [2022-11-20 12:01:01,190 INFO L226 Difference]: Without dead ends: 806 [2022-11-20 12:01:01,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 12:01:01,191 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 4435 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:01,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4437 Valid, 2068 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 12:01:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-20 12:01:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 437. [2022-11-20 12:01:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 349 states have (on average 1.4699140401146131) internal successors, (513), 434 states have internal predecessors, (513), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:01:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 527 transitions. [2022-11-20 12:01:01,201 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 527 transitions. Word has length 68 [2022-11-20 12:01:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:01,201 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 527 transitions. [2022-11-20 12:01:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.386363636363637) internal successors, (193), 45 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 527 transitions. [2022-11-20 12:01:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:01:01,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:01,203 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:01:01,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:01,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-20 12:01:01,410 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:01:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash -513218040, now seen corresponding path program 1 times [2022-11-20 12:01:01,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:01,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017525806] [2022-11-20 12:01:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:01,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:01:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:02,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017525806] [2022-11-20 12:01:02,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017525806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:02,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51250255] [2022-11-20 12:01:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:02,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:02,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:02,035 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:02,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:01:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 12:01:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:02,382 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:01:02,655 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 9 [2022-11-20 12:01:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:01:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:01:02,895 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-20 12:01:02,895 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 17 [2022-11-20 12:01:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:01:03,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51250255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:01:03,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:01:03,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 21 [2022-11-20 12:01:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691329323] [2022-11-20 12:01:03,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:01:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 12:01:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 12:01:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:01:03,161 INFO L87 Difference]: Start difference. First operand 437 states and 527 transitions. Second operand has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:05,319 INFO L93 Difference]: Finished difference Result 692 states and 811 transitions. [2022-11-20 12:01:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:01:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 12:01:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:05,322 INFO L225 Difference]: With dead ends: 692 [2022-11-20 12:01:05,322 INFO L226 Difference]: Without dead ends: 692 [2022-11-20 12:01:05,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:01:05,323 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 1597 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 1894 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:01:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-11-20 12:01:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 436. [2022-11-20 12:01:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 349 states have (on average 1.4613180515759312) internal successors, (510), 433 states have internal predecessors, (510), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:01:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 524 transitions. [2022-11-20 12:01:05,334 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 524 transitions. Word has length 68 [2022-11-20 12:01:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:05,334 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 524 transitions. [2022-11-20 12:01:05,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 524 transitions. [2022-11-20 12:01:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:01:05,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:05,336 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 12:01:05,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 12:01:05,543 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:01:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2108567334, now seen corresponding path program 1 times [2022-11-20 12:01:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560833249] [2022-11-20 12:01:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:01:07,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560833249] [2022-11-20 12:01:07,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560833249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406414891] [2022-11-20 12:01:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:07,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:07,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:07,464 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:07,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:01:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:07,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 12:01:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:07,829 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:07,870 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:01:07,871 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:07,985 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:01:08,059 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 26 [2022-11-20 12:01:08,199 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 12:01:08,199 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:08,316 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 30 [2022-11-20 12:01:08,361 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 30 [2022-11-20 12:01:08,495 INFO L321 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2022-11-20 12:01:08,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-11-20 12:01:08,674 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:01:08,674 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 12:01:08,695 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 14 [2022-11-20 12:01:08,886 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:01:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:01:08,897 INFO L350 Elim1Store]: Elim1 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 76 treesize of output 67 [2022-11-20 12:01:11,058 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:12,446 INFO L321 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2022-11-20 12:01:12,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 157 treesize of output 128 [2022-11-20 12:01:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:01:14,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:01:15,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:15,471 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 12:01:15,638 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_21 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_39| Int)) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_39| 1))) (or (not (= (select v_arrayElimArr_21 4) |c_ULTIMATE.start_main_~data~0#1.base|)) (= (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_39| v_arrayElimArr_21) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) 1) (not (= (select .cse0 (select v_arrayElimArr_21 0)) 1))))) is different from false [2022-11-20 12:01:15,668 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_21 (Array Int Int)) (v_ArrVal_3200 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_39| Int)) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_39| 1))) (or (not (= (select v_arrayElimArr_21 4) |c_ULTIMATE.start_main_~data~0#1.base|)) (= (select .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_3200) |v_ULTIMATE.start_main_~item~0#1.base_39| v_arrayElimArr_21) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) 1) (not (= (select .cse0 (select v_arrayElimArr_21 0)) 1))))) is different from false [2022-11-20 12:01:16,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:16,236 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2022-11-20 12:01:16,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:16,262 INFO L350 Elim1Store]: Elim1 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 218 treesize of output 206 [2022-11-20 12:01:16,271 INFO L350 Elim1Store]: Elim1 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 198 treesize of output 194 [2022-11-20 12:01:16,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:16,295 INFO L350 Elim1Store]: Elim1 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 214 treesize of output 190 [2022-11-20 12:01:36,013 WARN L233 SmtUtils]: Spent 18.51s on a formula simplification. DAG size of input: 101 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:01:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 5 not checked. [2022-11-20 12:01:36,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406414891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:01:36,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:01:36,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 19] total 50 [2022-11-20 12:01:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613402451] [2022-11-20 12:01:36,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:01:36,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 12:01:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:01:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 12:01:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2160, Unknown=7, NotChecked=190, Total=2550 [2022-11-20 12:01:36,603 INFO L87 Difference]: Start difference. First operand 436 states and 524 transitions. Second operand has 51 states, 50 states have (on average 3.3) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:01:42,006 INFO L93 Difference]: Finished difference Result 437 states and 526 transitions. [2022-11-20 12:01:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:01:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.3) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 12:01:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:01:42,008 INFO L225 Difference]: With dead ends: 437 [2022-11-20 12:01:42,008 INFO L226 Difference]: Without dead ends: 437 [2022-11-20 12:01:42,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=405, Invalid=3135, Unknown=8, NotChecked=234, Total=3782 [2022-11-20 12:01:42,009 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 82 mSDsluCounter, 3772 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 3999 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 815 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:01:42,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 3999 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1083 Invalid, 0 Unknown, 815 Unchecked, 1.2s Time] [2022-11-20 12:01:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-20 12:01:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-20 12:01:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 350 states have (on average 1.4628571428571429) internal successors, (512), 434 states have internal predecessors, (512), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:01:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 526 transitions. [2022-11-20 12:01:42,016 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 526 transitions. Word has length 68 [2022-11-20 12:01:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:01:42,017 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 526 transitions. [2022-11-20 12:01:42,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.3) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:01:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 526 transitions. [2022-11-20 12:01:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:01:42,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:01:42,018 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 12:01:42,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:01:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 12:01:42,226 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:01:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:01:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2108567335, now seen corresponding path program 1 times [2022-11-20 12:01:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:01:42,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706993355] [2022-11-20 12:01:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:01:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:01:44,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:01:44,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706993355] [2022-11-20 12:01:44,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706993355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:01:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711374352] [2022-11-20 12:01:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:01:44,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:01:44,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:01:44,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:01:44,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:01:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:01:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-20 12:01:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:01:44,915 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:44,925 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,036 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:01:45,037 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,048 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,132 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:01:45,223 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-20 12:01:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:01:45,232 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 31 [2022-11-20 12:01:45,386 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 12:01:45,386 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-20 12:01:45,529 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 37 [2022-11-20 12:01:45,551 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 12:01:45,609 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 37 [2022-11-20 12:01:45,623 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 12:01:45,659 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-20 12:01:45,659 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:01:45,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-20 12:01:45,778 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-20 12:01:45,791 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 30 [2022-11-20 12:01:45,818 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 30 [2022-11-20 12:01:45,827 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-11-20 12:01:47,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:47,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 45 [2022-11-20 12:01:47,460 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 12:01:47,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 12:01:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:01:47,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:01:48,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:48,788 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 12:01:48,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:48,803 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-11-20 12:01:48,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:48,812 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-11-20 12:01:55,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:55,363 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-20 12:01:55,368 INFO L350 Elim1Store]: Elim1 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 60 treesize of output 52 [2022-11-20 12:01:55,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:55,382 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 56 [2022-11-20 12:01:55,390 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2022-11-20 12:01:55,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:55,531 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2022-11-20 12:01:55,541 INFO L350 Elim1Store]: Elim1 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 346 treesize of output 334 [2022-11-20 12:01:55,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:55,576 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 274 [2022-11-20 12:01:55,590 INFO L350 Elim1Store]: Elim1 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 862 treesize of output 826 [2022-11-20 12:01:55,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:55,623 INFO L350 Elim1Store]: Elim1 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 828 treesize of output 802 [2022-11-20 12:01:55,647 INFO L350 Elim1Store]: Elim1 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 395 treesize of output 379 [2022-11-20 12:01:55,660 INFO L350 Elim1Store]: Elim1 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 774 treesize of output 758 [2022-11-20 12:01:55,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:01:55,688 INFO L350 Elim1Store]: Elim1 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 764 treesize of output 738 [2022-11-20 12:02:12,083 WARN L233 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 142 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:02:18,942 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:02:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:02:19,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711374352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:02:19,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:02:19,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 17] total 49 [2022-11-20 12:02:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753915287] [2022-11-20 12:02:19,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:02:19,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 12:02:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 12:02:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2272, Unknown=4, NotChecked=0, Total=2450 [2022-11-20 12:02:19,188 INFO L87 Difference]: Start difference. First operand 437 states and 526 transitions. Second operand has 50 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 50 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:28,710 INFO L93 Difference]: Finished difference Result 438 states and 527 transitions. [2022-11-20 12:02:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:02:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 50 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 12:02:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:28,711 INFO L225 Difference]: With dead ends: 438 [2022-11-20 12:02:28,711 INFO L226 Difference]: Without dead ends: 438 [2022-11-20 12:02:28,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=644, Invalid=3642, Unknown=4, NotChecked=0, Total=4290 [2022-11-20 12:02:28,712 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 509 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:28,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 3447 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2002 Invalid, 0 Unknown, 934 Unchecked, 2.5s Time] [2022-11-20 12:02:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-20 12:02:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2022-11-20 12:02:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 350 states have (on average 1.46) internal successors, (511), 434 states have internal predecessors, (511), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:02:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 525 transitions. [2022-11-20 12:02:28,720 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 525 transitions. Word has length 68 [2022-11-20 12:02:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:28,721 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 525 transitions. [2022-11-20 12:02:28,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 50 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 525 transitions. [2022-11-20 12:02:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 12:02:28,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:28,723 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:28,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:02:28,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:28,931 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:02:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash 718711401, now seen corresponding path program 1 times [2022-11-20 12:02:28,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477867138] [2022-11-20 12:02:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:28,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:02:29,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:29,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477867138] [2022-11-20 12:02:29,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477867138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:29,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:29,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:02:29,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637664525] [2022-11-20 12:02:29,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:29,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:02:29,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:29,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:02:29,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:02:29,004 INFO L87 Difference]: Start difference. First operand 437 states and 525 transitions. Second operand has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:29,162 INFO L93 Difference]: Finished difference Result 436 states and 523 transitions. [2022-11-20 12:02:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:02:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-20 12:02:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:29,164 INFO L225 Difference]: With dead ends: 436 [2022-11-20 12:02:29,164 INFO L226 Difference]: Without dead ends: 436 [2022-11-20 12:02:29,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:02:29,165 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 48 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:29,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 334 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:02:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-20 12:02:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-11-20 12:02:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 350 states have (on average 1.4542857142857142) internal successors, (509), 433 states have internal predecessors, (509), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:02:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 523 transitions. [2022-11-20 12:02:29,172 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 523 transitions. Word has length 70 [2022-11-20 12:02:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:29,173 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 523 transitions. [2022-11-20 12:02:29,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 523 transitions. [2022-11-20 12:02:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 12:02:29,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:29,174 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:02:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-20 12:02:29,175 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:02:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 718711402, now seen corresponding path program 1 times [2022-11-20 12:02:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892948680] [2022-11-20 12:02:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:02:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892948680] [2022-11-20 12:02:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892948680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:02:29,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:02:29,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:02:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887665136] [2022-11-20 12:02:29,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:02:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:02:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:02:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:02:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:02:29,297 INFO L87 Difference]: Start difference. First operand 436 states and 523 transitions. Second operand has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:02:29,464 INFO L93 Difference]: Finished difference Result 435 states and 521 transitions. [2022-11-20 12:02:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:02:29,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-20 12:02:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:02:29,466 INFO L225 Difference]: With dead ends: 435 [2022-11-20 12:02:29,466 INFO L226 Difference]: Without dead ends: 435 [2022-11-20 12:02:29,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:02:29,466 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:02:29,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 327 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:02:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-20 12:02:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2022-11-20 12:02:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 350 states have (on average 1.4485714285714286) internal successors, (507), 432 states have internal predecessors, (507), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:02:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 521 transitions. [2022-11-20 12:02:29,475 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 521 transitions. Word has length 70 [2022-11-20 12:02:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:02:29,476 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 521 transitions. [2022-11-20 12:02:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:02:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 521 transitions. [2022-11-20 12:02:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 12:02:29,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:02:29,477 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 12:02:29,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-20 12:02:29,478 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:02:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:02:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1862074248, now seen corresponding path program 1 times [2022-11-20 12:02:29,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:02:29,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337186951] [2022-11-20 12:02:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:02:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:02:32,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:02:32,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337186951] [2022-11-20 12:02:32,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337186951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:02:32,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429733568] [2022-11-20 12:02:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:02:32,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:02:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:02:32,832 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:02:32,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:02:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:02:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-20 12:02:33,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:02:33,235 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:33,252 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:33,260 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:02:33,294 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-20 12:02:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:02:33,304 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-11-20 12:02:33,345 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:02:33,346 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:33,487 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:33,497 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2022-11-20 12:02:33,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:02:33,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-11-20 12:02:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:02:33,543 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 12:02:33,544 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 61 treesize of output 54 [2022-11-20 12:02:33,744 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-20 12:02:33,744 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:33,901 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 12:02:33,901 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 62 [2022-11-20 12:02:33,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-20 12:02:33,997 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 12:02:33,997 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 62 [2022-11-20 12:02:34,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-20 12:02:34,058 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-20 12:02:34,059 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:02:34,217 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 12:02:34,217 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 55 [2022-11-20 12:02:34,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-11-20 12:02:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:02:34,266 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 12:02:34,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2022-11-20 12:02:34,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2022-11-20 12:02:36,769 INFO L321 Elim1Store]: treesize reduction 149, result has 28.4 percent of original size [2022-11-20 12:02:36,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 170 treesize of output 143 [2022-11-20 12:02:36,811 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-20 12:02:36,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 8 case distinctions, treesize of input 100 treesize of output 67 [2022-11-20 12:02:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:02:36,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:02:38,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:02:38,176 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 110 [2022-11-20 12:02:38,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:02:38,189 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 90 [2022-11-20 12:03:19,401 INFO L321 Elim1Store]: treesize reduction 132, result has 27.9 percent of original size [2022-11-20 12:03:19,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 147 [2022-11-20 12:03:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:19,527 INFO L321 Elim1Store]: treesize reduction 137, result has 25.1 percent of original size [2022-11-20 12:03:19,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 138 treesize of output 101 [2022-11-20 12:03:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:19,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:03:19,623 INFO L321 Elim1Store]: treesize reduction 73, result has 31.1 percent of original size [2022-11-20 12:03:19,624 INFO L350 Elim1Store]: Elim1 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 360 treesize of output 330 [2022-11-20 12:03:19,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:19,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:19,685 INFO L321 Elim1Store]: treesize reduction 29, result has 37.0 percent of original size [2022-11-20 12:03:19,686 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 150 [2022-11-20 12:03:19,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:03:19,719 INFO L350 Elim1Store]: Elim1 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 179 treesize of output 179 [2022-11-20 12:03:19,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:03:19,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 331 [2022-11-20 12:03:19,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:03:19,819 INFO L350 Elim1Store]: Elim1 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 294 treesize of output 246 [2022-11-20 12:03:19,840 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 46 [2022-11-20 12:03:22,264 INFO L321 Elim1Store]: treesize reduction 125, result has 31.7 percent of original size [2022-11-20 12:03:22,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 195 [2022-11-20 12:03:22,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:22,405 INFO L321 Elim1Store]: treesize reduction 109, result has 40.4 percent of original size [2022-11-20 12:03:22,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 129 [2022-11-20 12:03:22,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:22,528 INFO L321 Elim1Store]: treesize reduction 35, result has 55.1 percent of original size [2022-11-20 12:03:22,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 249 treesize of output 253 [2022-11-20 12:03:22,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:03:22,575 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 213 treesize of output 205 [2022-11-20 12:03:22,598 INFO L350 Elim1Store]: Elim1 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 134 treesize of output 130 [2022-11-20 12:03:22,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:03:22,771 INFO L321 Elim1Store]: treesize reduction 49, result has 53.8 percent of original size [2022-11-20 12:03:22,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 227 treesize of output 219 [2022-11-20 12:03:22,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:03:22,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 427 treesize of output 387 [2022-11-20 12:03:22,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:03:22,914 INFO L350 Elim1Store]: Elim1 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 71 treesize of output 75 [2022-11-20 12:03:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:03:28,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429733568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:03:28,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:03:28,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 24] total 56 [2022-11-20 12:03:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950124701] [2022-11-20 12:03:28,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:03:28,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:03:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:03:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:03:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2818, Unknown=31, NotChecked=0, Total=3080 [2022-11-20 12:03:28,797 INFO L87 Difference]: Start difference. First operand 435 states and 521 transitions. Second operand has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 56 states have internal predecessors, (167), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:04:03,390 WARN L233 SmtUtils]: Spent 26.20s on a formula simplification. DAG size of input: 158 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:05:02,357 WARN L233 SmtUtils]: Spent 53.65s on a formula simplification. DAG size of input: 211 DAG size of output: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:06:08,298 WARN L233 SmtUtils]: Spent 58.40s on a formula simplification. DAG size of input: 226 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:07:02,175 WARN L233 SmtUtils]: Spent 49.70s on a formula simplification. DAG size of input: 221 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:07:57,420 WARN L233 SmtUtils]: Spent 49.73s on a formula simplification. DAG size of input: 227 DAG size of output: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:09:03,490 WARN L233 SmtUtils]: Spent 58.14s on a formula simplification. DAG size of input: 245 DAG size of output: 178 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:09:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:09:05,457 INFO L93 Difference]: Finished difference Result 436 states and 522 transitions. [2022-11-20 12:09:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 12:09:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 56 states have internal predecessors, (167), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-20 12:09:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:09:05,459 INFO L225 Difference]: With dead ends: 436 [2022-11-20 12:09:05,460 INFO L226 Difference]: Without dead ends: 436 [2022-11-20 12:09:05,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 378.9s TimeCoverageRelationStatistics Valid=714, Invalid=4217, Unknown=39, NotChecked=0, Total=4970 [2022-11-20 12:09:05,461 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 479 mSDsluCounter, 4646 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 4871 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:09:05,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 4871 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1178 Invalid, 0 Unknown, 1027 Unchecked, 2.7s Time] [2022-11-20 12:09:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-20 12:09:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-11-20 12:09:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 351 states have (on average 1.4472934472934473) internal successors, (508), 433 states have internal predecessors, (508), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:09:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 522 transitions. [2022-11-20 12:09:05,469 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 522 transitions. Word has length 71 [2022-11-20 12:09:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:09:05,469 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 522 transitions. [2022-11-20 12:09:05,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 56 states have internal predecessors, (167), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 522 transitions. [2022-11-20 12:09:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 12:09:05,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:09:05,471 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:05,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:09:05,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:05,679 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:09:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1202893645, now seen corresponding path program 1 times [2022-11-20 12:09:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542247636] [2022-11-20 12:09:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:09:06,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542247636] [2022-11-20 12:09:06,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542247636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957013728] [2022-11-20 12:09:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:06,164 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:09:06,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:09:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:09:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:09:06,733 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:09:07,214 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:09:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:09:07,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:09:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:09:07,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957013728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:09:07,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:09:07,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 19 [2022-11-20 12:09:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232173550] [2022-11-20 12:09:07,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:09:07,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 12:09:07,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 12:09:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:09:07,609 INFO L87 Difference]: Start difference. First operand 436 states and 522 transitions. Second operand has 19 states, 19 states have (on average 9.052631578947368) internal successors, (172), 19 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:09:10,498 INFO L93 Difference]: Finished difference Result 529 states and 647 transitions. [2022-11-20 12:09:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:09:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.052631578947368) internal successors, (172), 19 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-20 12:09:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:09:10,500 INFO L225 Difference]: With dead ends: 529 [2022-11-20 12:09:10,500 INFO L226 Difference]: Without dead ends: 529 [2022-11-20 12:09:10,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 12:09:10,501 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1133 mSDsluCounter, 2475 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 2702 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:09:10,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2702 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 12:09:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-20 12:09:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 406. [2022-11-20 12:09:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 321 states have (on average 1.4548286604361371) internal successors, (467), 403 states have internal predecessors, (467), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:09:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 481 transitions. [2022-11-20 12:09:10,509 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 481 transitions. Word has length 72 [2022-11-20 12:09:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:09:10,510 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 481 transitions. [2022-11-20 12:09:10,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.052631578947368) internal successors, (172), 19 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 481 transitions. [2022-11-20 12:09:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 12:09:10,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:09:10,511 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:10,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-20 12:09:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-20 12:09:10,715 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:09:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash -808069366, now seen corresponding path program 1 times [2022-11-20 12:09:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985472364] [2022-11-20 12:09:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:09:10,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:10,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985472364] [2022-11-20 12:09:10,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985472364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:10,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:10,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:09:10,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200165332] [2022-11-20 12:09:10,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:10,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:09:10,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:09:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:09:10,820 INFO L87 Difference]: Start difference. First operand 406 states and 481 transitions. Second operand has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:09:11,068 INFO L93 Difference]: Finished difference Result 402 states and 473 transitions. [2022-11-20 12:09:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:09:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-20 12:09:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:09:11,070 INFO L225 Difference]: With dead ends: 402 [2022-11-20 12:09:11,070 INFO L226 Difference]: Without dead ends: 402 [2022-11-20 12:09:11,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:09:11,071 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 42 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:09:11,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 332 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:09:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-20 12:09:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-20 12:09:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 321 states have (on average 1.4299065420560748) internal successors, (459), 399 states have internal predecessors, (459), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:09:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 473 transitions. [2022-11-20 12:09:11,078 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 473 transitions. Word has length 72 [2022-11-20 12:09:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:09:11,079 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 473 transitions. [2022-11-20 12:09:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 473 transitions. [2022-11-20 12:09:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 12:09:11,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:09:11,080 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-11-20 12:09:11,080 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:09:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -808069365, now seen corresponding path program 1 times [2022-11-20 12:09:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:11,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333000379] [2022-11-20 12:09:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:09:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333000379] [2022-11-20 12:09:11,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333000379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:09:11,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:09:11,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:09:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055615280] [2022-11-20 12:09:11,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:09:11,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:09:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:09:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:09:11,197 INFO L87 Difference]: Start difference. First operand 402 states and 473 transitions. Second operand has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:09:11,499 INFO L93 Difference]: Finished difference Result 398 states and 465 transitions. [2022-11-20 12:09:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:09:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-20 12:09:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:09:11,500 INFO L225 Difference]: With dead ends: 398 [2022-11-20 12:09:11,500 INFO L226 Difference]: Without dead ends: 398 [2022-11-20 12:09:11,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:09:11,501 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 38 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:09:11,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 325 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:09:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-20 12:09:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-11-20 12:09:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 321 states have (on average 1.4049844236760125) internal successors, (451), 395 states have internal predecessors, (451), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:09:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 465 transitions. [2022-11-20 12:09:11,509 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 465 transitions. Word has length 72 [2022-11-20 12:09:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:09:11,509 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 465 transitions. [2022-11-20 12:09:11,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:09:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 465 transitions. [2022-11-20 12:09:11,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 12:09:11,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:09:11,511 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:09:11,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-20 12:09:11,511 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:09:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:09:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1539639829, now seen corresponding path program 3 times [2022-11-20 12:09:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:09:11,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359122318] [2022-11-20 12:09:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:09:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:09:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:09:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:09:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359122318] [2022-11-20 12:09:15,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359122318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:09:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903569172] [2022-11-20 12:09:15,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:09:15,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:09:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:09:15,011 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:09:15,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:09:15,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:09:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:09:15,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 12:09:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:09:15,775 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:09:15,839 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:09:15,840 INFO L350 Elim1Store]: Elim1 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 18 [2022-11-20 12:09:16,129 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:09:16,129 INFO L350 Elim1Store]: Elim1 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 22 [2022-11-20 12:09:16,293 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:09:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:09:16,441 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2022-11-20 12:09:16,863 INFO L321 Elim1Store]: treesize reduction 54, result has 45.5 percent of original size [2022-11-20 12:09:16,864 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 73 [2022-11-20 12:09:17,239 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 39 [2022-11-20 12:09:17,311 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 39 [2022-11-20 12:09:17,498 INFO L321 Elim1Store]: treesize reduction 86, result has 38.6 percent of original size [2022-11-20 12:09:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 58 treesize of output 96 [2022-11-20 12:09:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:09:18,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-20 12:09:18,296 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:09:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:09:18,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 62 [2022-11-20 12:09:20,560 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:09:23,472 INFO L321 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2022-11-20 12:09:23,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 35 case distinctions, treesize of input 162 treesize of output 172 [2022-11-20 12:09:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:29,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:09:36,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:09:36,763 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 86 [2022-11-20 12:09:36,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:09:36,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:09:36,799 INFO L350 Elim1Store]: Elim1 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 230 treesize of output 222 [2022-11-20 12:09:36,814 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 149 treesize of output 143 [2022-11-20 12:09:37,021 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 128 treesize of output 116 [2022-11-20 12:09:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:09:37,085 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 315 treesize of output 293 [2022-11-20 12:09:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:09:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903569172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:09:45,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:09:45,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 25] total 65 [2022-11-20 12:09:45,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484755529] [2022-11-20 12:09:45,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:09:45,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 12:09:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:09:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 12:09:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3951, Unknown=4, NotChecked=0, Total=4290 [2022-11-20 12:09:45,782 INFO L87 Difference]: Start difference. First operand 398 states and 465 transitions. Second operand has 66 states, 65 states have (on average 3.076923076923077) internal successors, (200), 66 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:10:10,068 INFO L93 Difference]: Finished difference Result 661 states and 757 transitions. [2022-11-20 12:10:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:10:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.076923076923077) internal successors, (200), 66 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-20 12:10:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:10:10,071 INFO L225 Difference]: With dead ends: 661 [2022-11-20 12:10:10,071 INFO L226 Difference]: Without dead ends: 661 [2022-11-20 12:10:10,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=1985, Invalid=9567, Unknown=4, NotChecked=0, Total=11556 [2022-11-20 12:10:10,073 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 2828 mSDsluCounter, 5979 mSDsCounter, 0 mSdLazyCounter, 3695 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 6204 SdHoareTripleChecker+Invalid, 6124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2265 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:10:10,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2830 Valid, 6204 Invalid, 6124 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [164 Valid, 3695 Invalid, 0 Unknown, 2265 Unchecked, 8.6s Time] [2022-11-20 12:10:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-20 12:10:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 402. [2022-11-20 12:10:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 325 states have (on average 1.403076923076923) internal successors, (456), 399 states have internal predecessors, (456), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:10:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 470 transitions. [2022-11-20 12:10:10,083 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 470 transitions. Word has length 73 [2022-11-20 12:10:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:10:10,083 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 470 transitions. [2022-11-20 12:10:10,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.076923076923077) internal successors, (200), 66 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:10:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 470 transitions. [2022-11-20 12:10:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 12:10:10,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:10:10,085 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:10:10,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:10:10,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-20 12:10:10,294 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-11-20 12:10:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:10:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1539639830, now seen corresponding path program 2 times [2022-11-20 12:10:10,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:10:10,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028339048] [2022-11-20 12:10:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:10:10,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:10:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:10:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:10:14,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:10:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028339048] [2022-11-20 12:10:14,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028339048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:10:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150079131] [2022-11-20 12:10:14,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:10:14,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:10:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:10:14,186 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:10:14,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1593e98-a611-4111-994c-44e76cc83166/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 12:10:14,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:10:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:10:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 12:10:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:10:14,680 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:14,693 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:10:14,981 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:15,029 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:10:15,030 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:15,142 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:10:15,142 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:15,167 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:10:15,360 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:10:15,376 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 12:10:15,765 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-20 12:10:15,765 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 18 treesize of output 30 [2022-11-20 12:10:15,834 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-20 12:10:15,835 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 24 [2022-11-20 12:10:16,047 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 12:10:16,059 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 36 [2022-11-20 12:10:16,127 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 36 [2022-11-20 12:10:16,140 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-20 12:10:16,322 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-20 12:10:16,322 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 18 treesize of output 30 [2022-11-20 12:10:16,587 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:10:16,587 INFO L350 Elim1Store]: Elim1 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 40 [2022-11-20 12:10:16,612 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-20 12:10:16,680 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:10:16,681 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2022-11-20 12:10:16,700 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-20 12:10:16,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:10:16,983 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 12:10:16,984 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 49 [2022-11-20 12:10:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:10:17,117 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-20 12:10:17,117 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 46 [2022-11-20 12:10:22,957 INFO L321 Elim1Store]: treesize reduction 100, result has 37.9 percent of original size [2022-11-20 12:10:22,958 INFO L350 Elim1Store]: Elim1 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 7 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 153 [2022-11-20 12:10:23,272 INFO L321 Elim1Store]: treesize reduction 100, result has 37.9 percent of original size [2022-11-20 12:10:23,273 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 126