./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --- 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-38b53e6 [2022-11-25 18:29:12,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:29:12,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:29:12,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:29:12,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:29:12,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:29:12,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:29:12,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:29:12,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:29:12,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:29:12,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:29:12,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:29:12,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:29:12,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:29:12,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:29:12,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:29:12,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:29:12,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:29:12,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:29:12,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:29:12,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:29:12,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:29:12,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:29:12,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:29:12,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:29:12,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:29:12,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:29:12,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:29:12,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:29:12,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:29:12,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:29:12,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:29:12,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:29:12,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:29:12,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:29:12,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:29:12,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:29:12,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:29:12,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:29:12,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:29:12,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:29:12,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:29:12,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:29:12,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:29:12,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:29:12,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:29:12,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:29:12,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:29:12,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:29:12,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:29:12,161 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:29:12,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:29:12,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:29:12,162 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:29:12,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:29:12,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:29:12,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:29:12,162 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:29:12,163 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:29:12,163 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:29:12,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:29:12,163 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:29:12,163 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:29:12,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:29:12,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:29:12,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:29:12,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:29:12,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:29:12,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:29:12,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:29:12,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:29:12,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:29:12,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:29:12,165 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:29:12,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:29:12,166 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2022-11-25 18:29:12,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:29:12,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:29:12,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:29:12,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:29:12,473 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:29:12,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2022-11-25 18:29:15,665 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:29:15,924 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:29:15,925 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2022-11-25 18:29:15,932 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/data/25a250903/2140f52adcca4d88998c5a333ce61984/FLAGbb988da65 [2022-11-25 18:29:15,947 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/data/25a250903/2140f52adcca4d88998c5a333ce61984 [2022-11-25 18:29:15,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:29:15,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:29:15,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:29:15,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:29:15,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:29:15,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:29:15" (1/1) ... [2022-11-25 18:29:15,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3f71c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:15, skipping insertion in model container [2022-11-25 18:29:15,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:29:15" (1/1) ... [2022-11-25 18:29:15,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:29:15,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:29:16,130 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_fe0a5c95-87fd-49a4-8380-739130365f01/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2022-11-25 18:29:16,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:29:16,165 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:29:16,179 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_fe0a5c95-87fd-49a4-8380-739130365f01/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2022-11-25 18:29:16,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:29:16,203 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:29:16,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16 WrapperNode [2022-11-25 18:29:16,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:29:16,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:29:16,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:29:16,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:29:16,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,240 INFO L138 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2022-11-25 18:29:16,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:29:16,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:29:16,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:29:16,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:29:16,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,261 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:29:16,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:29:16,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:29:16,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:29:16,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (1/1) ... [2022-11-25 18:29:16,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:29:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:16,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:29:16,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:29:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:29:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 18:29:16,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 18:29:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:29:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-25 18:29:16,345 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-25 18:29:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:29:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:29:16,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:29:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:29:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:29:16,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:29:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:29:16,488 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:29:16,490 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:29:16,861 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:29:16,873 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:29:16,876 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 18:29:16,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:29:16 BoogieIcfgContainer [2022-11-25 18:29:16,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:29:16,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:29:16,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:29:16,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:29:16,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:29:15" (1/3) ... [2022-11-25 18:29:16,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337042e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:29:16, skipping insertion in model container [2022-11-25 18:29:16,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:29:16" (2/3) ... [2022-11-25 18:29:16,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337042e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:29:16, skipping insertion in model container [2022-11-25 18:29:16,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:29:16" (3/3) ... [2022-11-25 18:29:16,894 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2022-11-25 18:29:16,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:29:16,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-25 18:29:16,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:29:16,997 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=PETRI_NET, 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;@193cba2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:29:16,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-25 18:29:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 35 states have (on average 1.6) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:29:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 18:29:17,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:17,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:17,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash -724999257, now seen corresponding path program 1 times [2022-11-25 18:29:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:17,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732973316] [2022-11-25 18:29:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:17,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:17,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:17,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:17,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732973316] [2022-11-25 18:29:17,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732973316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:17,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:17,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:17,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076403217] [2022-11-25 18:29:17,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:17,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:29:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:29:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:29:17,281 INFO L87 Difference]: Start difference. First operand has 64 states, 35 states have (on average 1.6) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:29:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:17,306 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-25 18:29:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:29:17,309 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-25 18:29:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:17,317 INFO L225 Difference]: With dead ends: 64 [2022-11-25 18:29:17,317 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 18:29:17,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:29:17,323 INFO L413 NwaCegarLoop]: 70 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, 70 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 [2022-11-25 18:29:17,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:29:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 18:29:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-25 18:29:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 50 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:29:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-11-25 18:29:17,374 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 22 [2022-11-25 18:29:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:17,375 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-11-25 18:29:17,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:29:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-11-25 18:29:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 18:29:17,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:17,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:29:17,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1833988771, now seen corresponding path program 1 times [2022-11-25 18:29:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354465199] [2022-11-25 18:29:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:17,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354465199] [2022-11-25 18:29:17,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354465199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:17,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:17,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:29:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872607302] [2022-11-25 18:29:17,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:17,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:29:17,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:29:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:29:17,835 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 18:29:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:18,052 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2022-11-25 18:29:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:29:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-25 18:29:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:18,061 INFO L225 Difference]: With dead ends: 106 [2022-11-25 18:29:18,063 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 18:29:18,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:29:18,065 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 49 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:18,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 318 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:29:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 18:29:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2022-11-25 18:29:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.56) internal successors, (78), 67 states have internal predecessors, (78), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 18:29:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-11-25 18:29:18,090 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 22 [2022-11-25 18:29:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:18,091 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-11-25 18:29:18,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 18:29:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-11-25 18:29:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 18:29:18,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:18,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:18,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:29:18,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1832511589, now seen corresponding path program 1 times [2022-11-25 18:29:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51849549] [2022-11-25 18:29:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:18,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51849549] [2022-11-25 18:29:18,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51849549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:18,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:18,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:29:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820954223] [2022-11-25 18:29:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:18,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:29:18,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:29:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:29:18,289 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:18,396 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-11-25 18:29:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:29:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-11-25 18:29:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:18,406 INFO L225 Difference]: With dead ends: 82 [2022-11-25 18:29:18,406 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 18:29:18,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:18,411 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:18,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 129 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:29:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 18:29:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-25 18:29:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.5) internal successors, (75), 64 states have internal predecessors, (75), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 18:29:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-11-25 18:29:18,437 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 22 [2022-11-25 18:29:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:18,438 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-11-25 18:29:18,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-11-25 18:29:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 18:29:18,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:18,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:29:18,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1832511590, now seen corresponding path program 1 times [2022-11-25 18:29:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:18,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484434388] [2022-11-25 18:29:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:18,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:19,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484434388] [2022-11-25 18:29:19,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484434388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:19,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:19,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:29:19,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111991734] [2022-11-25 18:29:19,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:29:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:29:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:29:19,034 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:19,566 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2022-11-25 18:29:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:29:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-11-25 18:29:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:19,571 INFO L225 Difference]: With dead ends: 87 [2022-11-25 18:29:19,571 INFO L226 Difference]: Without dead ends: 87 [2022-11-25 18:29:19,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:29:19,572 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:19,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 243 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 18:29:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-25 18:29:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-11-25 18:29:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 66 states have internal predecessors, (77), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2022-11-25 18:29:19,587 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 22 [2022-11-25 18:29:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:19,588 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2022-11-25 18:29:19,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2022-11-25 18:29:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 18:29:19,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:19,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:19,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:29:19,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash 107045159, now seen corresponding path program 1 times [2022-11-25 18:29:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124345478] [2022-11-25 18:29:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:19,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124345478] [2022-11-25 18:29:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124345478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:19,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:19,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:29:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878476935] [2022-11-25 18:29:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:29:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:29:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:29:19,918 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:20,123 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2022-11-25 18:29:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:29:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-25 18:29:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:20,125 INFO L225 Difference]: With dead ends: 120 [2022-11-25 18:29:20,125 INFO L226 Difference]: Without dead ends: 120 [2022-11-25 18:29:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:29:20,127 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 78 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:20,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 257 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:29:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-25 18:29:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2022-11-25 18:29:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 68 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-11-25 18:29:20,140 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 24 [2022-11-25 18:29:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:20,140 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-11-25 18:29:20,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-11-25 18:29:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 18:29:20,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:20,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:20,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:29:20,142 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1801661154, now seen corresponding path program 1 times [2022-11-25 18:29:20,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:20,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523049304] [2022-11-25 18:29:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523049304] [2022-11-25 18:29:20,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523049304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:20,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:20,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:29:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504999076] [2022-11-25 18:29:20,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:20,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:29:20,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:29:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:29:20,484 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:20,751 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-11-25 18:29:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:29:20,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-25 18:29:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:20,754 INFO L225 Difference]: With dead ends: 91 [2022-11-25 18:29:20,756 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 18:29:20,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:29:20,762 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 42 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:20,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 453 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:29:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 18:29:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-25 18:29:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 71 states have internal predecessors, (82), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2022-11-25 18:29:20,783 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 29 [2022-11-25 18:29:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:20,785 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2022-11-25 18:29:20,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:29:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2022-11-25 18:29:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 18:29:20,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:20,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:20,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:29:20,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1023324068, now seen corresponding path program 1 times [2022-11-25 18:29:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:20,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118173854] [2022-11-25 18:29:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:21,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118173854] [2022-11-25 18:29:21,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118173854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763190931] [2022-11-25 18:29:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:21,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:21,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:21,182 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:21,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:29:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:29:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:21,389 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 [2022-11-25 18:29:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:22,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763190931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:22,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:22,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 21 [2022-11-25 18:29:22,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979781351] [2022-11-25 18:29:22,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:22,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:29:22,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:29:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:29:22,323 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 18:29:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:24,004 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2022-11-25 18:29:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 18:29:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 30 [2022-11-25 18:29:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:24,006 INFO L225 Difference]: With dead ends: 142 [2022-11-25 18:29:24,007 INFO L226 Difference]: Without dead ends: 142 [2022-11-25 18:29:24,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 18:29:24,008 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 280 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:24,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 365 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 18:29:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-25 18:29:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2022-11-25 18:29:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 73 states have internal predecessors, (84), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2022-11-25 18:29:24,021 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 30 [2022-11-25 18:29:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:24,022 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2022-11-25 18:29:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 18:29:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2022-11-25 18:29:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 18:29:24,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:24,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:24,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:24,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:24,229 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:24,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1023324067, now seen corresponding path program 1 times [2022-11-25 18:29:24,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:24,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719583197] [2022-11-25 18:29:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:24,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719583197] [2022-11-25 18:29:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719583197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:24,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:24,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:29:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479055415] [2022-11-25 18:29:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:29:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:29:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:29:24,328 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:24,454 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2022-11-25 18:29:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:29:24,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-25 18:29:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:24,458 INFO L225 Difference]: With dead ends: 90 [2022-11-25 18:29:24,459 INFO L226 Difference]: Without dead ends: 90 [2022-11-25 18:29:24,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:29:24,460 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:24,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 121 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:29:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-25 18:29:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-25 18:29:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 69 states have internal predecessors, (76), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-11-25 18:29:24,478 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 30 [2022-11-25 18:29:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:24,479 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-11-25 18:29:24,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-11-25 18:29:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 18:29:24,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:24,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:24,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:29:24,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:24,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1658275025, now seen corresponding path program 1 times [2022-11-25 18:29:24,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:24,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361077836] [2022-11-25 18:29:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:24,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:24,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361077836] [2022-11-25 18:29:24,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361077836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051817074] [2022-11-25 18:29:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:24,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:24,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:29:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 18:29:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:25,001 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 10 treesize of output 9 [2022-11-25 18:29:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:25,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051817074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:26,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:26,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2022-11-25 18:29:26,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562906020] [2022-11-25 18:29:26,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:26,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:29:26,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:29:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:29:26,378 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 27 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 18:29:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:28,707 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2022-11-25 18:29:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:29:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-25 18:29:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:28,709 INFO L225 Difference]: With dead ends: 128 [2022-11-25 18:29:28,710 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 18:29:28,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 18:29:28,711 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 326 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:28,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 323 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 18:29:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 18:29:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2022-11-25 18:29:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 68 states have internal predecessors, (74), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2022-11-25 18:29:28,718 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 31 [2022-11-25 18:29:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:28,719 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2022-11-25 18:29:28,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 18:29:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2022-11-25 18:29:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 18:29:28,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:28,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:28,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:28,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash 922787578, now seen corresponding path program 1 times [2022-11-25 18:29:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102019991] [2022-11-25 18:29:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:28,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:28,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:28,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 18:29:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:29,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:29,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102019991] [2022-11-25 18:29:29,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102019991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:29,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:29,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:29:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094225068] [2022-11-25 18:29:29,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:29,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:29:29,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:29:29,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:29:29,007 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:29,037 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-11-25 18:29:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:29:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-25 18:29:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:29,039 INFO L225 Difference]: With dead ends: 88 [2022-11-25 18:29:29,039 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 18:29:29,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:29,040 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:29,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 126 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:29:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 18:29:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-25 18:29:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 67 states have internal predecessors, (73), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:29:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-11-25 18:29:29,051 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 32 [2022-11-25 18:29:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:29,052 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-11-25 18:29:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-11-25 18:29:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 18:29:29,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:29,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:29,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:29:29,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2035601245, now seen corresponding path program 1 times [2022-11-25 18:29:29,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:29,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891870544] [2022-11-25 18:29:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 18:29:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:29:29,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:29,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891870544] [2022-11-25 18:29:29,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891870544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:29,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:29,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:29:29,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995131845] [2022-11-25 18:29:29,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:29,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:29,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:29,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:29,168 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:29,234 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2022-11-25 18:29:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:29:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-25 18:29:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:29,238 INFO L225 Difference]: With dead ends: 87 [2022-11-25 18:29:29,238 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 18:29:29,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:29:29,239 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:29,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:29:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 18:29:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-25 18:29:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 53 states have internal predecessors, (58), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 18:29:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-11-25 18:29:29,245 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 34 [2022-11-25 18:29:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:29,247 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-11-25 18:29:29,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-11-25 18:29:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 18:29:29,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:29,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:29,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:29:29,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 287149833, now seen corresponding path program 1 times [2022-11-25 18:29:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007657980] [2022-11-25 18:29:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:29,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:29,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:29,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007657980] [2022-11-25 18:29:29,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007657980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:29,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679046295] [2022-11-25 18:29:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:29,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:29,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:29:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:29,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:29:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:29,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:29:29,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679046295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:29,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:29:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2022-11-25 18:29:29,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629502265] [2022-11-25 18:29:29,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:29,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:29:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:29:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:29:29,667 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:29,851 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-11-25 18:29:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:29:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-25 18:29:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:29,853 INFO L225 Difference]: With dead ends: 88 [2022-11-25 18:29:29,853 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 18:29:29,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:29:29,854 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 71 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:29,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 248 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:29:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 18:29:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-11-25 18:29:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.196078431372549) internal successors, (61), 56 states have internal predecessors, (61), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 18:29:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2022-11-25 18:29:29,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 39 [2022-11-25 18:29:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:29,863 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2022-11-25 18:29:29,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:29:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2022-11-25 18:29:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 18:29:29,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:29,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:29,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:30,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:29:30,065 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:30,065 INFO L85 PathProgramCache]: Analyzing trace with hash 285681908, now seen corresponding path program 1 times [2022-11-25 18:29:30,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:30,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187275228] [2022-11-25 18:29:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 18:29:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187275228] [2022-11-25 18:29:30,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187275228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765749758] [2022-11-25 18:29:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:30,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:30,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:29:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:29:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:30,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:30,827 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 30 treesize of output 26 [2022-11-25 18:29:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:29:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765749758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:31,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:31,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2022-11-25 18:29:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107242712] [2022-11-25 18:29:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:31,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:29:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:29:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:29:31,097 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-25 18:29:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:31,840 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2022-11-25 18:29:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:29:31,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 39 [2022-11-25 18:29:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:31,842 INFO L225 Difference]: With dead ends: 135 [2022-11-25 18:29:31,842 INFO L226 Difference]: Without dead ends: 135 [2022-11-25 18:29:31,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-11-25 18:29:31,843 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 178 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:31,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 339 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 18:29:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-25 18:29:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2022-11-25 18:29:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-25 18:29:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-11-25 18:29:31,850 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 39 [2022-11-25 18:29:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:31,851 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-11-25 18:29:31,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-25 18:29:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-11-25 18:29:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 18:29:31,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:31,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:31,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:32,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:29:32,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash -337593259, now seen corresponding path program 1 times [2022-11-25 18:29:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268010277] [2022-11-25 18:29:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 18:29:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:32,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268010277] [2022-11-25 18:29:32,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268010277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:32,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142769452] [2022-11-25 18:29:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:32,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:32,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:32,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:29:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:29:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:32,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:33,142 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 31 treesize of output 27 [2022-11-25 18:29:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:33,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142769452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:33,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:33,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2022-11-25 18:29:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238815718] [2022-11-25 18:29:33,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:33,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 18:29:33,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 18:29:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 18:29:33,339 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 18:29:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:35,752 INFO L93 Difference]: Finished difference Result 222 states and 268 transitions. [2022-11-25 18:29:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 18:29:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 41 [2022-11-25 18:29:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:35,754 INFO L225 Difference]: With dead ends: 222 [2022-11-25 18:29:35,755 INFO L226 Difference]: Without dead ends: 222 [2022-11-25 18:29:35,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=614, Invalid=3808, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 18:29:35,757 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 606 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:35,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 475 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 18:29:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-25 18:29:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 139. [2022-11-25 18:29:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 105 states have internal predecessors, (116), 22 states have call successors, (22), 10 states have call predecessors, (22), 13 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-25 18:29:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 167 transitions. [2022-11-25 18:29:35,767 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 167 transitions. Word has length 41 [2022-11-25 18:29:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:35,768 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 167 transitions. [2022-11-25 18:29:35,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 18:29:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 167 transitions. [2022-11-25 18:29:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 18:29:35,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:35,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:35,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:29:35,981 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -525112999, now seen corresponding path program 1 times [2022-11-25 18:29:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106220172] [2022-11-25 18:29:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:29:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:29:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 18:29:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:29:36,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106220172] [2022-11-25 18:29:36,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106220172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765478406] [2022-11-25 18:29:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:36,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:36,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:36,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:29:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 18:29:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:36,444 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 7 treesize of output 6 [2022-11-25 18:29:36,794 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 23 [2022-11-25 18:29:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:36,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:39,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765478406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:39,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:39,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2022-11-25 18:29:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130011753] [2022-11-25 18:29:39,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:39,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:29:39,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:29:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2022-11-25 18:29:39,176 INFO L87 Difference]: Start difference. First operand 139 states and 167 transitions. Second operand has 27 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 18:29:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:40,051 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2022-11-25 18:29:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 18:29:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 46 [2022-11-25 18:29:40,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:40,053 INFO L225 Difference]: With dead ends: 141 [2022-11-25 18:29:40,053 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 18:29:40,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 18:29:40,054 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:40,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 282 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 18:29:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 18:29:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-25 18:29:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 106 states have internal predecessors, (117), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-25 18:29:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2022-11-25 18:29:40,068 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 46 [2022-11-25 18:29:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:40,068 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2022-11-25 18:29:40,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 18:29:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2022-11-25 18:29:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 18:29:40,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:40,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:40,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:40,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:29:40,276 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1888339410, now seen corresponding path program 1 times [2022-11-25 18:29:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:40,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203396737] [2022-11-25 18:29:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:40,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 18:29:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:29:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 18:29:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:29:40,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:40,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203396737] [2022-11-25 18:29:40,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203396737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66935446] [2022-11-25 18:29:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:40,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:40,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:40,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:40,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:29:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:29:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 18:29:41,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:41,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:41,280 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 30 treesize of output 34 [2022-11-25 18:29:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:29:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66935446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:41,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:41,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 14 [2022-11-25 18:29:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846894887] [2022-11-25 18:29:41,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:41,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:29:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:29:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:29:41,462 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 15 states, 13 states have (on average 4.384615384615385) internal successors, (57), 15 states have internal predecessors, (57), 8 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-25 18:29:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:42,128 INFO L93 Difference]: Finished difference Result 195 states and 235 transitions. [2022-11-25 18:29:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:29:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.384615384615385) internal successors, (57), 15 states have internal predecessors, (57), 8 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2022-11-25 18:29:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:42,132 INFO L225 Difference]: With dead ends: 195 [2022-11-25 18:29:42,132 INFO L226 Difference]: Without dead ends: 195 [2022-11-25 18:29:42,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:29:42,133 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 70 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:42,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 343 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 18:29:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-25 18:29:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 140. [2022-11-25 18:29:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 105 states have internal predecessors, (114), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-25 18:29:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-11-25 18:29:42,144 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 52 [2022-11-25 18:29:42,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:42,145 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-11-25 18:29:42,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.384615384615385) internal successors, (57), 15 states have internal predecessors, (57), 8 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-25 18:29:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-11-25 18:29:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 18:29:42,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:42,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:42,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:42,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:42,353 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2076994669, now seen corresponding path program 1 times [2022-11-25 18:29:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:42,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153828976] [2022-11-25 18:29:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:42,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:42,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:42,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 18:29:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:42,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:29:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:43,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 18:29:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:29:43,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:43,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153828976] [2022-11-25 18:29:43,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153828976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:43,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531075773] [2022-11-25 18:29:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:43,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:43,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:43,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:43,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:29:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 18:29:43,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:29:43,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:43,882 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 5 [2022-11-25 18:29:44,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:44,660 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 42 treesize of output 46 [2022-11-25 18:29:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:29:45,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531075773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:45,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:45,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-11-25 18:29:45,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448857014] [2022-11-25 18:29:45,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:45,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 18:29:45,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 18:29:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 18:29:45,031 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 40 states, 33 states have (on average 2.242424242424242) internal successors, (74), 34 states have internal predecessors, (74), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-25 18:29:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:48,991 INFO L93 Difference]: Finished difference Result 293 states and 365 transitions. [2022-11-25 18:29:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 18:29:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 33 states have (on average 2.242424242424242) internal successors, (74), 34 states have internal predecessors, (74), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) Word has length 54 [2022-11-25 18:29:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:48,996 INFO L225 Difference]: With dead ends: 293 [2022-11-25 18:29:48,997 INFO L226 Difference]: Without dead ends: 270 [2022-11-25 18:29:48,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=515, Invalid=4315, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 18:29:48,999 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 258 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:48,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 880 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 18:29:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-25 18:29:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 184. [2022-11-25 18:29:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 139 states have internal predecessors, (156), 26 states have call successors, (26), 11 states have call predecessors, (26), 17 states have return successors, (41), 33 states have call predecessors, (41), 26 states have call successors, (41) [2022-11-25 18:29:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2022-11-25 18:29:49,010 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 54 [2022-11-25 18:29:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:49,010 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2022-11-25 18:29:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 33 states have (on average 2.242424242424242) internal successors, (74), 34 states have internal predecessors, (74), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-25 18:29:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2022-11-25 18:29:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 18:29:49,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:49,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:49,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:49,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:29:49,223 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:29:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:49,223 INFO L85 PathProgramCache]: Analyzing trace with hash 412534293, now seen corresponding path program 1 times [2022-11-25 18:29:49,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:49,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383666083] [2022-11-25 18:29:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:49,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:29:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 18:29:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:29:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 18:29:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:29:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 18:29:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:29:49,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383666083] [2022-11-25 18:29:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383666083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746627304] [2022-11-25 18:29:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:49,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:49,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:49,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:29:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:29:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:49,713 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 7 treesize of output 6 [2022-11-25 18:30:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:30:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:30,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746627304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:30,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:30:30,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2022-11-25 18:30:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737855503] [2022-11-25 18:30:30,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:30:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:30:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=266, Unknown=18, NotChecked=0, Total=342 [2022-11-25 18:30:30,495 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-25 18:30:32,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:34,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:36,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:38,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:44,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:46,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:48,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:50,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:02,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:04,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:06,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:08,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:11,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:13,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:15,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:17,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:25,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:27,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:39,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:41,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:43,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:45,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:47,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:49,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:51,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:53,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:55,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:57,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:07,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:09,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:20,055 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 69 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:32:22,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:24,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:26,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:28,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:30,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:32,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:34,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:36,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:38,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:40,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:42,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:32:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:32:42,332 INFO L93 Difference]: Finished difference Result 271 states and 332 transitions. [2022-11-25 18:32:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:32:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 54 [2022-11-25 18:32:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:32:42,334 INFO L225 Difference]: With dead ends: 271 [2022-11-25 18:32:42,334 INFO L226 Difference]: Without dead ends: 262 [2022-11-25 18:32:42,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 89.5s TimeCoverageRelationStatistics Valid=146, Invalid=576, Unknown=34, NotChecked=0, Total=756 [2022-11-25 18:32:42,335 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 30 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.9s IncrementalHoareTripleChecker+Time [2022-11-25 18:32:42,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 363 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 412 Invalid, 41 Unknown, 0 Unchecked, 82.9s Time] [2022-11-25 18:32:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-25 18:32:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 215. [2022-11-25 18:32:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 164 states have internal predecessors, (184), 32 states have call successors, (32), 14 states have call predecessors, (32), 19 states have return successors, (44), 36 states have call predecessors, (44), 32 states have call successors, (44) [2022-11-25 18:32:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 260 transitions. [2022-11-25 18:32:42,345 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 260 transitions. Word has length 54 [2022-11-25 18:32:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:32:42,346 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 260 transitions. [2022-11-25 18:32:42,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-25 18:32:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 260 transitions. [2022-11-25 18:32:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 18:32:42,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:32:42,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:42,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:42,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:32:42,548 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:32:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash 806764368, now seen corresponding path program 1 times [2022-11-25 18:32:42,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:42,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680030846] [2022-11-25 18:32:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:42,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:32:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:32:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:32:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:32:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 18:32:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 18:32:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 18:32:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 18:32:42,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680030846] [2022-11-25 18:32:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680030846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928111405] [2022-11-25 18:32:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:42,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:42,739 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:42,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:32:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:42,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:32:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:42,841 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 7 treesize of output 6 [2022-11-25 18:32:42,991 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 23 [2022-11-25 18:32:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 18:32:43,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:32:43,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928111405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:32:43,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:32:43,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 12 [2022-11-25 18:32:43,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308085180] [2022-11-25 18:32:43,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:32:43,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:32:43,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:32:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:32:43,018 INFO L87 Difference]: Start difference. First operand 215 states and 260 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 18:32:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:32:43,150 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-11-25 18:32:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:32:43,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2022-11-25 18:32:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:32:43,151 INFO L225 Difference]: With dead ends: 70 [2022-11-25 18:32:43,151 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 18:32:43,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:32:43,152 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:32:43,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 141 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:32:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 18:32:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-25 18:32:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 18:32:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-11-25 18:32:43,155 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 56 [2022-11-25 18:32:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:32:43,155 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-11-25 18:32:43,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 18:32:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-11-25 18:32:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 18:32:43,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:32:43,156 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:43,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:43,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:43,359 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-25 18:32:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1896699969, now seen corresponding path program 1 times [2022-11-25 18:32:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:43,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363471645] [2022-11-25 18:32:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:32:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 18:32:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 18:32:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 18:32:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 18:32:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:32:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 18:32:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:32:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 18:32:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 18:32:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363471645] [2022-11-25 18:32:43,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363471645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19107719] [2022-11-25 18:32:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:43,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:43,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:43,980 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:43,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:32:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:32:44,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 18:32:44,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19107719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:45,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:32:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2022-11-25 18:32:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950936216] [2022-11-25 18:32:45,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:45,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 18:32:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 18:32:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 18:32:45,136 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 30 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 25 states have internal predecessors, (57), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-25 18:32:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:32:46,633 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-11-25 18:32:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 18:32:46,634 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 25 states have internal predecessors, (57), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 71 [2022-11-25 18:32:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:32:46,634 INFO L225 Difference]: With dead ends: 74 [2022-11-25 18:32:46,634 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 18:32:46,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=357, Invalid=2399, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 18:32:46,635 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 91 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:32:46,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 499 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 18:32:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 18:32:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 18:32:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 18:32:46,637 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2022-11-25 18:32:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:32:46,638 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 18:32:46,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 25 states have internal predecessors, (57), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-25 18:32:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 18:32:46,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 18:32:46,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2022-11-25 18:32:46,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2022-11-25 18:32:46,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2022-11-25 18:32:46,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2022-11-25 18:32:46,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (12 of 17 remaining) [2022-11-25 18:32:46,642 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (11 of 17 remaining) [2022-11-25 18:32:46,643 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (10 of 17 remaining) [2022-11-25 18:32:46,643 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (9 of 17 remaining) [2022-11-25 18:32:46,643 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2022-11-25 18:32:46,643 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2022-11-25 18:32:46,644 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2022-11-25 18:32:46,644 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2022-11-25 18:32:46,644 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2022-11-25 18:32:46,644 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2022-11-25 18:32:46,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2022-11-25 18:32:46,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2022-11-25 18:32:46,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2022-11-25 18:32:46,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 18:32:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:46,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:46,856 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:32:46,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:32:46 BoogieIcfgContainer [2022-11-25 18:32:46,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:32:46,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:32:46,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:32:46,860 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:32:46,860 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:29:16" (3/4) ... [2022-11-25 18:32:46,865 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 18:32:46,873 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-25 18:32:46,873 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2022-11-25 18:32:46,873 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 18:32:46,878 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2022-11-25 18:32:46,879 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-25 18:32:46,880 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 18:32:46,880 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 18:32:46,923 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 18:32:46,934 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:32:46,935 INFO L158 Benchmark]: Toolchain (without parser) took 210982.66ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 108.3MB in the beginning and 75.7MB in the end (delta: 32.6MB). Peak memory consumption was 115.9MB. Max. memory is 16.1GB. [2022-11-25 18:32:46,935 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 142.6MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:32:46,935 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.42ms. Allocated memory is still 142.6MB. Free memory was 108.3MB in the beginning and 97.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:32:46,936 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.72ms. Allocated memory is still 142.6MB. Free memory was 97.4MB in the beginning and 96.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:32:46,936 INFO L158 Benchmark]: Boogie Preprocessor took 23.72ms. Allocated memory is still 142.6MB. Free memory was 96.2MB in the beginning and 94.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:32:46,936 INFO L158 Benchmark]: RCFGBuilder took 614.58ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 79.7MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-25 18:32:46,936 INFO L158 Benchmark]: TraceAbstraction took 209976.84ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 78.9MB in the beginning and 78.9MB in the end (delta: 68.6kB). Peak memory consumption was 82.3MB. Max. memory is 16.1GB. [2022-11-25 18:32:46,937 INFO L158 Benchmark]: Witness Printer took 74.81ms. Allocated memory is still 224.4MB. Free memory was 78.9MB in the beginning and 75.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:32:46,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 142.6MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.42ms. Allocated memory is still 142.6MB. Free memory was 108.3MB in the beginning and 97.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.72ms. Allocated memory is still 142.6MB. Free memory was 97.4MB in the beginning and 96.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.72ms. Allocated memory is still 142.6MB. Free memory was 96.2MB in the beginning and 94.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 614.58ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 79.7MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 209976.84ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 78.9MB in the beginning and 78.9MB in the end (delta: 68.6kB). Peak memory consumption was 82.3MB. Max. memory is 16.1GB. * Witness Printer took 74.81ms. Allocated memory is still 224.4MB. Free memory was 78.9MB in the beginning and 75.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 209.9s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 148.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 mSolverCounterUnknown, 2422 SdHoareTripleChecker+Valid, 90.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2402 mSDsluCounter, 6116 SdHoareTripleChecker+Invalid, 88.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5190 mSDsCounter, 917 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7731 IncrementalHoareTripleChecker+Invalid, 8689 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 917 mSolverCounterUnsat, 926 mSDtfsCounter, 7731 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1309 GetRequests, 820 SyntacticMatches, 19 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3424 ImplicationChecksByTransitivity, 105.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=215occurred in iteration=18, InterpolantAutomatonStates: 269, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 453 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 57.5s InterpolantComputationTime, 1263 NumberOfCodeBlocks, 1263 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1473 ConstructedInterpolants, 94 QuantifiedInterpolants, 10106 SizeOfPredicates, 103 NumberOfNonLiveVariables, 2192 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 37 InterpolantComputations, 11 PerfectInterpolantSequences, 511/618 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 18:32:47,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe0a5c95-87fd-49a4-8380-739130365f01/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE