./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/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_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/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_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/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 cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 --- 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 15:29:36,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:29:36,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:29:36,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:29:36,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:29:36,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:29:36,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:29:36,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:29:36,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:29:36,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:29:36,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:29:36,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:29:36,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:29:36,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:29:36,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:29:36,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:29:36,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:29:36,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:29:36,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:29:36,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:29:36,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:29:36,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:29:36,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:29:36,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:29:36,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:29:36,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:29:36,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:29:36,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:29:36,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:29:36,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:29:36,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:29:36,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:29:36,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:29:36,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:29:36,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:29:36,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:29:36,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:29:36,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:29:36,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:29:36,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:29:36,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:29:36,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:29:36,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:29:36,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:29:36,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:29:36,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:29:36,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:29:36,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:29:36,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:29:36,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:29:36,155 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:29:36,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:29:36,157 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:29:36,157 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:29:36,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:29:36,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:29:36,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:29:36,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:29:36,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:29:36,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:29:36,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:29:36,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:29:36,159 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:29:36,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:29:36,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:29:36,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:29:36,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:29:36,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:29:36,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:29:36,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:29:36,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:29:36,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:29:36,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:29:36,162 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:29:36,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:29:36,163 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_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2022-11-25 15:29:36,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:29:36,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:29:36,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:29:36,480 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:29:36,481 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:29:36,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-11-25 15:29:39,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:29:39,698 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:29:39,699 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-11-25 15:29:39,710 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/data/5415d9f70/922df94385f04b689e867461471ff7ee/FLAG9cfce5a8f [2022-11-25 15:29:39,725 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/data/5415d9f70/922df94385f04b689e867461471ff7ee [2022-11-25 15:29:39,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:29:39,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:29:39,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:29:39,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:29:39,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:29:39,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:29:39" (1/1) ... [2022-11-25 15:29:39,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bb85c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:39, skipping insertion in model container [2022-11-25 15:29:39,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:29:39" (1/1) ... [2022-11-25 15:29:39,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:29:39,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:29:40,094 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_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2022-11-25 15:29:40,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:29:40,109 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:29:40,192 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_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2022-11-25 15:29:40,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:29:40,226 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:29:40,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40 WrapperNode [2022-11-25 15:29:40,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:29:40,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:29:40,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:29:40,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:29:40,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,303 INFO L138 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 117 [2022-11-25 15:29:40,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:29:40,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:29:40,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:29:40,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:29:40,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:29:40,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:29:40,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:29:40,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:29:40,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (1/1) ... [2022-11-25 15:29:40,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:29:40,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:40,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:29:40,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:29:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:29:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-25 15:29:40,420 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-25 15:29:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:29:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:29:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:29:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 15:29:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 15:29:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:29:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 15:29:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:29:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:29:40,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:29:40,540 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:29:40,542 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:29:40,996 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:29:41,009 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:29:41,016 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:29:41,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:29:41 BoogieIcfgContainer [2022-11-25 15:29:41,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:29:41,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:29:41,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:29:41,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:29:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:29:39" (1/3) ... [2022-11-25 15:29:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cea972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:29:41, skipping insertion in model container [2022-11-25 15:29:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:29:40" (2/3) ... [2022-11-25 15:29:41,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cea972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:29:41, skipping insertion in model container [2022-11-25 15:29:41,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:29:41" (3/3) ... [2022-11-25 15:29:41,030 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2022-11-25 15:29:41,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:29:41,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-25 15:29:41,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:29:41,099 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;@11d2b5e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:29:41,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-25 15:29:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 15:29:41,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:41,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:29:41,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash 893736149, now seen corresponding path program 1 times [2022-11-25 15:29:41,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:41,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832251898] [2022-11-25 15:29:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:29:41,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832251898] [2022-11-25 15:29:41,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832251898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:41,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:41,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:29:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013667070] [2022-11-25 15:29:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:41,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:29:41,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:29:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:29:41,429 INFO L87 Difference]: Start difference. First operand has 93 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:29:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:41,569 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-11-25 15:29:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:29:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 15:29:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:41,579 INFO L225 Difference]: With dead ends: 91 [2022-11-25 15:29:41,579 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 15:29:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:29:41,584 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:41,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 134 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:29:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 15:29:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-25 15:29:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-11-25 15:29:41,622 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 6 [2022-11-25 15:29:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:41,622 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-11-25 15:29:41,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:29:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-11-25 15:29:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 15:29:41,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:41,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:29:41,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:29:41,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash 893736150, now seen corresponding path program 1 times [2022-11-25 15:29:41,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:41,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171018829] [2022-11-25 15:29:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:41,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:29:41,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:41,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171018829] [2022-11-25 15:29:41,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171018829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:41,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:41,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:29:41,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336115512] [2022-11-25 15:29:41,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:41,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:29:41,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:29:41,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:29:41,782 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:29:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:41,852 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-11-25 15:29:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:29:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 15:29:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:41,854 INFO L225 Difference]: With dead ends: 86 [2022-11-25 15:29:41,854 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 15:29:41,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:29:41,856 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:41,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:29:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 15:29:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-25 15:29:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-11-25 15:29:41,864 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 6 [2022-11-25 15:29:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:41,865 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-11-25 15:29:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:29:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-11-25 15:29:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 15:29:41,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:41,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:29:41,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1919809879, now seen corresponding path program 1 times [2022-11-25 15:29:41,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:41,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443746517] [2022-11-25 15:29:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:41,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:29:42,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443746517] [2022-11-25 15:29:42,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443746517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:42,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:42,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:29:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216508906] [2022-11-25 15:29:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:29:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:29:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:29:42,008 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 15:29:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:42,109 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-11-25 15:29:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:29:42,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-25 15:29:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:42,111 INFO L225 Difference]: With dead ends: 93 [2022-11-25 15:29:42,111 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 15:29:42,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:29:42,112 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:42,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 201 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:29:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 15:29:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-11-25 15:29:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 83 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-11-25 15:29:42,122 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 13 [2022-11-25 15:29:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:42,122 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-11-25 15:29:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 15:29:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-11-25 15:29:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 15:29:42,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:42,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:29:42,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash 951797020, now seen corresponding path program 1 times [2022-11-25 15:29:42,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:42,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405525248] [2022-11-25 15:29:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:42,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:42,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:29:42,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:42,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405525248] [2022-11-25 15:29:42,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405525248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:42,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:42,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 15:29:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52929953] [2022-11-25 15:29:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:42,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:29:42,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:29:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:29:42,439 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:42,738 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-11-25 15:29:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:29:42,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-25 15:29:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:42,741 INFO L225 Difference]: With dead ends: 141 [2022-11-25 15:29:42,742 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 15:29:42,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:29:42,743 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 67 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:42,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 245 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:29:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 15:29:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 86. [2022-11-25 15:29:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-11-25 15:29:42,751 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 22 [2022-11-25 15:29:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:42,751 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-11-25 15:29:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-11-25 15:29:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 15:29:42,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:42,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:29:42,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash 951797021, now seen corresponding path program 1 times [2022-11-25 15:29:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:42,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211545961] [2022-11-25 15:29:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:43,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:43,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211545961] [2022-11-25 15:29:43,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211545961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:43,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:43,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 15:29:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932682635] [2022-11-25 15:29:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:43,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:29:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:43,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:29:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:29:43,125 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:43,340 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-11-25 15:29:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:29:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-25 15:29:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:43,342 INFO L225 Difference]: With dead ends: 86 [2022-11-25 15:29:43,342 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 15:29:43,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:29:43,343 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 76 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:43,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 231 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:29:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 15:29:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-25 15:29:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-11-25 15:29:43,348 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 22 [2022-11-25 15:29:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:43,349 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-11-25 15:29:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-11-25 15:29:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 15:29:43,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:43,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:43,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:29:43,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash -389076539, now seen corresponding path program 1 times [2022-11-25 15:29:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:43,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825041475] [2022-11-25 15:29:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:29:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:43,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825041475] [2022-11-25 15:29:43,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825041475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:43,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889175870] [2022-11-25 15:29:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:43,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:43,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:43,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:43,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:29:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:29:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:43,952 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 15:29:44,013 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_256 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_256))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-25 15:29:44,110 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:29:44,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:29:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-25 15:29:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:29:44,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889175870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:44,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:29:44,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-11-25 15:29:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657661370] [2022-11-25 15:29:44,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:29:44,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:29:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:29:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-11-25 15:29:44,215 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:29:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:44,539 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-11-25 15:29:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:29:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-25 15:29:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:44,541 INFO L225 Difference]: With dead ends: 138 [2022-11-25 15:29:44,541 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 15:29:44,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-11-25 15:29:44,543 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 62 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:44,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 247 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-11-25 15:29:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 15:29:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2022-11-25 15:29:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.826086956521739) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-11-25 15:29:44,550 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 25 [2022-11-25 15:29:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:44,550 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-11-25 15:29:44,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:29:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-11-25 15:29:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 15:29:44,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:44,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:44,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:29:44,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:29:44,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash -389076538, now seen corresponding path program 1 times [2022-11-25 15:29:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127570295] [2022-11-25 15:29:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:45,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:45,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127570295] [2022-11-25 15:29:45,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127570295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953342030] [2022-11-25 15:29:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:45,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:45,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:45,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:29:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 15:29:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:45,432 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 15:29:45,664 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_361 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_361))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-25 15:29:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:29:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:29:45,750 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:29:45,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 15:29:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-25 15:29:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:29:45,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953342030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:45,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:29:45,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-11-25 15:29:45,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654275269] [2022-11-25 15:29:45,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:29:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:29:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:29:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=323, Unknown=1, NotChecked=36, Total=420 [2022-11-25 15:29:45,993 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:29:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:46,523 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2022-11-25 15:29:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:29:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-11-25 15:29:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:46,525 INFO L225 Difference]: With dead ends: 138 [2022-11-25 15:29:46,525 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 15:29:46,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=386, Unknown=1, NotChecked=40, Total=506 [2022-11-25 15:29:46,526 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 369 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:46,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 286 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 558 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2022-11-25 15:29:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 15:29:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 83. [2022-11-25 15:29:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 79 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-11-25 15:29:46,531 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 25 [2022-11-25 15:29:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:46,532 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-11-25 15:29:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:29:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-11-25 15:29:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:29:46,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:46,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:46,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:29:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:46,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 904455987, now seen corresponding path program 1 times [2022-11-25 15:29:46,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:46,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790518008] [2022-11-25 15:29:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:46,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:29:46,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:46,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790518008] [2022-11-25 15:29:46,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790518008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:46,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886723143] [2022-11-25 15:29:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:46,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:46,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:46,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:29:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:29:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:29:47,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:29:47,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886723143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:47,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:29:47,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-25 15:29:47,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251168528] [2022-11-25 15:29:47,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:47,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:29:47,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:29:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:29:47,103 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:47,119 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-11-25 15:29:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:29:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-25 15:29:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:47,122 INFO L225 Difference]: With dead ends: 138 [2022-11-25 15:29:47,122 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 15:29:47,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:29:47,123 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 122 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:47,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 171 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:29:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 15:29:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2022-11-25 15:29:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-11-25 15:29:47,128 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 29 [2022-11-25 15:29:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:47,129 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-11-25 15:29:47,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-11-25 15:29:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:29:47,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:47,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:47,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:29:47,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:29:47,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash 904455976, now seen corresponding path program 1 times [2022-11-25 15:29:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377757781] [2022-11-25 15:29:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:47,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:29:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:47,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377757781] [2022-11-25 15:29:47,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377757781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:47,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036368733] [2022-11-25 15:29:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:47,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:47,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:47,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:47,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:29:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:29:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:47,931 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 15:29:47,958 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 5 treesize of output 3 [2022-11-25 15:29:47,981 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_590 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_590))))) is different from true [2022-11-25 15:29:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:29:48,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:29:48,079 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 5 treesize of output 3 [2022-11-25 15:29:48,092 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_591 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_591))))) is different from true [2022-11-25 15:29:48,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:29:48,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:29:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-25 15:29:48,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:29:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036368733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:48,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:29:48,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2022-11-25 15:29:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194127787] [2022-11-25 15:29:48,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:29:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:29:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:29:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=141, Unknown=2, NotChecked=50, Total=240 [2022-11-25 15:29:48,255 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:29:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:48,759 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-11-25 15:29:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:29:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-11-25 15:29:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:48,763 INFO L225 Difference]: With dead ends: 120 [2022-11-25 15:29:48,763 INFO L226 Difference]: Without dead ends: 120 [2022-11-25 15:29:48,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=238, Unknown=2, NotChecked=66, Total=380 [2022-11-25 15:29:48,764 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 182 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:48,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 293 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 484 Invalid, 0 Unknown, 152 Unchecked, 0.4s Time] [2022-11-25 15:29:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-25 15:29:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2022-11-25 15:29:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.6875) internal successors, (81), 76 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-11-25 15:29:48,767 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 29 [2022-11-25 15:29:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:48,768 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-11-25 15:29:48,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:29:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-11-25 15:29:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:29:48,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:48,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:48,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:29:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 15:29:48,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 904455977, now seen corresponding path program 1 times [2022-11-25 15:29:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:48,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094371737] [2022-11-25 15:29:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:49,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:29:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094371737] [2022-11-25 15:29:49,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094371737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900566146] [2022-11-25 15:29:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:49,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:49,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:49,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:49,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:29:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:29:49,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:49,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:29:49,580 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 5 treesize of output 3 [2022-11-25 15:29:49,598 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_708 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_708) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-25 15:29:49,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:29:49,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:29:49,659 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 5 treesize of output 3 [2022-11-25 15:29:49,666 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_709 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_709) |c_#length|)))) is different from true [2022-11-25 15:29:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:29:49,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:29:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-25 15:29:49,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:29:49,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900566146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:49,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:29:49,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-11-25 15:29:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698901016] [2022-11-25 15:29:49,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:29:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:29:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:29:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=188, Unknown=2, NotChecked=58, Total=306 [2022-11-25 15:29:49,950 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:29:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:50,226 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-25 15:29:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:29:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-11-25 15:29:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:50,227 INFO L225 Difference]: With dead ends: 71 [2022-11-25 15:29:50,227 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 15:29:50,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=230, Unknown=2, NotChecked=66, Total=380 [2022-11-25 15:29:50,228 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 308 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:50,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 176 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2022-11-25 15:29:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 15:29:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-25 15:29:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-11-25 15:29:50,232 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 29 [2022-11-25 15:29:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:50,232 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-11-25 15:29:50,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:29:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-11-25 15:29:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 15:29:50,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:50,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:50,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:29:50,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:50,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2026635805, now seen corresponding path program 1 times [2022-11-25 15:29:50,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:50,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269245768] [2022-11-25 15:29:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:50,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:50,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:50,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:29:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:50,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269245768] [2022-11-25 15:29:50,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269245768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:50,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:50,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 15:29:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522299577] [2022-11-25 15:29:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:29:50,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:29:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:29:50,731 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:51,098 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-11-25 15:29:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:29:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-25 15:29:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:51,100 INFO L225 Difference]: With dead ends: 105 [2022-11-25 15:29:51,100 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 15:29:51,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:29:51,101 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 175 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:51,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 330 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:29:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 15:29:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2022-11-25 15:29:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.489795918367347) internal successors, (73), 68 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-11-25 15:29:51,104 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 30 [2022-11-25 15:29:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:51,104 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-11-25 15:29:51,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-11-25 15:29:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 15:29:51,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:51,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:51,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:29:51,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2026635804, now seen corresponding path program 1 times [2022-11-25 15:29:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:51,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787986356] [2022-11-25 15:29:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:51,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:51,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:51,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787986356] [2022-11-25 15:29:51,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787986356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:51,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:51,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 15:29:51,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426238641] [2022-11-25 15:29:51,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:29:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:29:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:29:51,480 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:51,899 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-11-25 15:29:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:29:51,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-25 15:29:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:51,901 INFO L225 Difference]: With dead ends: 99 [2022-11-25 15:29:51,901 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 15:29:51,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:29:51,902 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 316 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:51,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 312 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:29:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 15:29:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2022-11-25 15:29:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.469387755102041) internal successors, (72), 68 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-11-25 15:29:51,905 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 30 [2022-11-25 15:29:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:51,906 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-11-25 15:29:51,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-11-25 15:29:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 15:29:51,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:51,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:51,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 15:29:51,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1055563858, now seen corresponding path program 1 times [2022-11-25 15:29:51,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656039708] [2022-11-25 15:29:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:51,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:52,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:52,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656039708] [2022-11-25 15:29:52,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656039708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:52,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:52,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 15:29:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098756691] [2022-11-25 15:29:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:29:52,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:29:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:29:52,140 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:52,477 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-11-25 15:29:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:29:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-25 15:29:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:52,479 INFO L225 Difference]: With dead ends: 122 [2022-11-25 15:29:52,479 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 15:29:52,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:29:52,480 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 374 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:52,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 375 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:29:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 15:29:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2022-11-25 15:29:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 80 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-11-25 15:29:52,483 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 35 [2022-11-25 15:29:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:52,483 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-11-25 15:29:52,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-11-25 15:29:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 15:29:52,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:52,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:52,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 15:29:52,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1636827734, now seen corresponding path program 1 times [2022-11-25 15:29:52,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:52,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859839005] [2022-11-25 15:29:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:52,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:52,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:29:52,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859839005] [2022-11-25 15:29:52,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859839005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:52,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:52,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 15:29:52,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280639697] [2022-11-25 15:29:52,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:29:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:29:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:29:52,603 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:52,761 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-11-25 15:29:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:29:52,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-25 15:29:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:52,763 INFO L225 Difference]: With dead ends: 84 [2022-11-25 15:29:52,764 INFO L226 Difference]: Without dead ends: 84 [2022-11-25 15:29:52,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:29:52,765 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:52,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 192 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:29:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-25 15:29:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-25 15:29:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 79 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-25 15:29:52,768 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 36 [2022-11-25 15:29:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:52,769 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-25 15:29:52,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-25 15:29:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 15:29:52,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:52,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:52,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 15:29:52,776 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1636827733, now seen corresponding path program 1 times [2022-11-25 15:29:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:52,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326664467] [2022-11-25 15:29:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:53,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:53,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:53,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326664467] [2022-11-25 15:29:53,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326664467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:53,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:53,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 15:29:53,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735342063] [2022-11-25 15:29:53,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:53,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:29:53,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:29:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:29:53,312 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:53,865 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-11-25 15:29:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:29:53,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-25 15:29:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:53,867 INFO L225 Difference]: With dead ends: 131 [2022-11-25 15:29:53,867 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 15:29:53,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:29:53,868 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 373 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:53,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 395 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:29:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 15:29:53,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-11-25 15:29:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 89 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2022-11-25 15:29:53,872 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 36 [2022-11-25 15:29:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:53,876 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2022-11-25 15:29:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2022-11-25 15:29:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 15:29:53,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:53,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:53,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 15:29:53,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1637258683, now seen corresponding path program 1 times [2022-11-25 15:29:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884452320] [2022-11-25 15:29:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:54,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:54,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:54,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:54,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884452320] [2022-11-25 15:29:54,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884452320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:54,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:54,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 15:29:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409111905] [2022-11-25 15:29:54,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:54,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:29:54,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:29:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:29:54,174 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:54,543 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2022-11-25 15:29:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:29:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-25 15:29:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:54,545 INFO L225 Difference]: With dead ends: 114 [2022-11-25 15:29:54,545 INFO L226 Difference]: Without dead ends: 114 [2022-11-25 15:29:54,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:29:54,546 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 289 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:54,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 298 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:29:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-25 15:29:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2022-11-25 15:29:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 92 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2022-11-25 15:29:54,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 36 [2022-11-25 15:29:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:54,549 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2022-11-25 15:29:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2022-11-25 15:29:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 15:29:54,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:54,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 15:29:54,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash 784588468, now seen corresponding path program 1 times [2022-11-25 15:29:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:54,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897690163] [2022-11-25 15:29:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:54,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:29:54,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:54,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897690163] [2022-11-25 15:29:54,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897690163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:54,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:54,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:29:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293171563] [2022-11-25 15:29:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:29:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:29:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:29:54,644 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:54,761 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-11-25 15:29:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:29:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-25 15:29:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:54,762 INFO L225 Difference]: With dead ends: 95 [2022-11-25 15:29:54,762 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 15:29:54,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 15:29:54,763 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:54,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 175 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:29:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 15:29:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-25 15:29:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.4) internal successors, (105), 91 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2022-11-25 15:29:54,766 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 37 [2022-11-25 15:29:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:54,766 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2022-11-25 15:29:54,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2022-11-25 15:29:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 15:29:54,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:54,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:54,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 15:29:54,768 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1447561176, now seen corresponding path program 1 times [2022-11-25 15:29:54,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:54,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817747549] [2022-11-25 15:29:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:55,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:55,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:55,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:55,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817747549] [2022-11-25 15:29:55,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817747549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:55,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835000675] [2022-11-25 15:29:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:55,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:55,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:55,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:29:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:29:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:29:55,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 15:29:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:29:55,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:29:55,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835000675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:55,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:29:55,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-25 15:29:55,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291213014] [2022-11-25 15:29:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:55,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:29:55,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:29:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:29:55,454 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:55,581 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-11-25 15:29:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:29:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-25 15:29:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:55,583 INFO L225 Difference]: With dead ends: 94 [2022-11-25 15:29:55,583 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 15:29:55,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:29:55,584 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 113 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:55,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:29:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 15:29:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-25 15:29:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 90 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2022-11-25 15:29:55,590 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 38 [2022-11-25 15:29:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:55,591 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2022-11-25 15:29:55,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2022-11-25 15:29:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:29:55,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:55,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:55,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:29:55,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 15:29:55,799 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash -306294352, now seen corresponding path program 1 times [2022-11-25 15:29:55,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:55,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531469168] [2022-11-25 15:29:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:56,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:29:56,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:56,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531469168] [2022-11-25 15:29:56,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531469168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:29:56,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:29:56,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 15:29:56,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242631461] [2022-11-25 15:29:56,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:56,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:29:56,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:29:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:29:56,175 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:29:56,552 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2022-11-25 15:29:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:29:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-25 15:29:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:29:56,553 INFO L225 Difference]: With dead ends: 99 [2022-11-25 15:29:56,554 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 15:29:56,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:29:56,554 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:29:56,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 388 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:29:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 15:29:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-11-25 15:29:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.355263157894737) internal successors, (103), 91 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 15:29:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-11-25 15:29:56,558 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 41 [2022-11-25 15:29:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:29:56,558 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-11-25 15:29:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:29:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-11-25 15:29:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:29:56,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:29:56,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 15:29:56,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:29:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -306241737, now seen corresponding path program 1 times [2022-11-25 15:29:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:56,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933800036] [2022-11-25 15:29:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:29:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:57,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:29:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:57,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933800036] [2022-11-25 15:29:57,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933800036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179814978] [2022-11-25 15:29:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:57,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:57,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:57,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:57,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:29:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:29:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:57,544 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 15:29:57,735 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:29:57,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 15:29:57,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:29:57,919 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 15:29:57,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 15:29:58,158 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 45 treesize of output 33 [2022-11-25 15:29:58,327 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-25 15:29:58,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-11-25 15:29:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:29:58,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:29:58,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-25 15:29:58,561 INFO L321 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-11-25 15:29:58,562 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 26 treesize of output 25 [2022-11-25 15:29:58,573 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1509 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1509))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2022-11-25 15:29:58,591 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1509 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1509))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (not (= .cse1 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))))) is different from false [2022-11-25 15:29:58,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:29:58,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-11-25 15:29:58,646 INFO L321 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-11-25 15:29:58,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 120 [2022-11-25 15:29:58,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:29:58,662 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 93 treesize of output 87 [2022-11-25 15:29:58,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179814978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:58,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:29:58,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2022-11-25 15:29:58,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322163155] [2022-11-25 15:29:58,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:29:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:29:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:29:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1612, Unknown=2, NotChecked=162, Total=1892 [2022-11-25 15:29:58,979 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 39 states, 37 states have (on average 1.837837837837838) internal successors, (68), 33 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 15:30:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:30:00,801 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2022-11-25 15:30:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:30:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.837837837837838) internal successors, (68), 33 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-25 15:30:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:30:00,804 INFO L225 Difference]: With dead ends: 134 [2022-11-25 15:30:00,804 INFO L226 Difference]: Without dead ends: 134 [2022-11-25 15:30:00,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=368, Invalid=2830, Unknown=2, NotChecked=222, Total=3422 [2022-11-25 15:30:00,806 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 456 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:30:00,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 731 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:30:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-25 15:30:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2022-11-25 15:30:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.309278350515464) internal successors, (127), 112 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:30:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2022-11-25 15:30:00,818 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 41 [2022-11-25 15:30:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:30:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2022-11-25 15:30:00,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.837837837837838) internal successors, (68), 33 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 15:30:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2022-11-25 15:30:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:30:00,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:30:00,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:00,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:01,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:01,032 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:30:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:01,032 INFO L85 PathProgramCache]: Analyzing trace with hash -306241736, now seen corresponding path program 1 times [2022-11-25 15:30:01,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:01,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383035609] [2022-11-25 15:30:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:01,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:01,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:30:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:02,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:30:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:02,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383035609] [2022-11-25 15:30:02,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383035609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360500823] [2022-11-25 15:30:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:02,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:30:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-25 15:30:02,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:02,494 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 15:30:02,802 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:30:02,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 15:30:02,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:30:02,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:30:03,100 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 15:30:03,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 15:30:03,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:30:03,814 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-25 15:30:03,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 41 [2022-11-25 15:30:03,825 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 15:30:03,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-25 15:30:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:03,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:04,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:04,765 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 126 treesize of output 130 [2022-11-25 15:30:04,845 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_prenex_3 (Array Int Int)) (v_prenex_4 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_3))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_4) v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select .cse1 v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (<= 0 (select (select .cse1 .cse0) .cse2)) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1627 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1627) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1628 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1628))) (let ((.cse3 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| .cse3)) (< (select (select .cse4 .cse5) .cse3) 1))))) (not (= .cse5 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1627 (Array Int Int))) (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1627))) (let ((.cse6 (select (select .cse8 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) (forall ((v_ArrVal_1628 (Array Int Int))) (let ((.cse7 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1628) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| .cse7)) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse8 .cse6) .cse7)))))))))) is different from false [2022-11-25 15:30:04,942 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_prenex_3 (Array Int Int)) (v_prenex_4 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_3))) (let ((.cse0 (select (select .cse1 v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_prenex_4) v_prenex_2) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (<= 0 (select (select .cse1 .cse2) .cse0)) (not (= |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse2)))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1627 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1627) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1628 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1628))) (let ((.cse3 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse3 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (< (select (select .cse4 .cse5) .cse3) 1))))) (not (= .cse5 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1627 (Array Int Int))) (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1627))) (let ((.cse6 (select (select .cse8 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse6 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (forall ((v_ArrVal_1628 (Array Int Int))) (let ((.cse7 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1628) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse7 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse8 .cse6) .cse7)))))))))) is different from false [2022-11-25 15:30:04,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:04,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 52 [2022-11-25 15:30:04,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:04,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2022-11-25 15:30:05,033 INFO L321 Elim1Store]: treesize reduction 21, result has 73.1 percent of original size [2022-11-25 15:30:05,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 148 [2022-11-25 15:30:05,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:05,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 173 [2022-11-25 15:30:05,071 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 158 treesize of output 148 [2022-11-25 15:30:05,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:05,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 142 [2022-11-25 15:30:06,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:06,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2022-11-25 15:30:06,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:06,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2022-11-25 15:30:06,044 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 15:30:06,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 77 [2022-11-25 15:30:06,215 INFO L321 Elim1Store]: treesize reduction 67, result has 64.0 percent of original size [2022-11-25 15:30:06,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 186 treesize of output 260 [2022-11-25 15:30:06,241 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 144 treesize of output 124 [2022-11-25 15:30:06,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:06,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 189 [2022-11-25 15:30:06,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:06,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2022-11-25 15:30:06,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:06,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2022-11-25 15:30:06,894 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 15:30:06,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 77 [2022-11-25 15:30:07,056 INFO L321 Elim1Store]: treesize reduction 67, result has 64.0 percent of original size [2022-11-25 15:30:07,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 186 treesize of output 260 [2022-11-25 15:30:07,080 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 144 treesize of output 124 [2022-11-25 15:30:07,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:07,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 189 [2022-11-25 15:30:08,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360500823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:08,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:30:08,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2022-11-25 15:30:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745986624] [2022-11-25 15:30:08,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:30:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:30:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2718, Unknown=2, NotChecked=210, Total=3080 [2022-11-25 15:30:08,215 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 37 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 15:30:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:30:12,233 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2022-11-25 15:30:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:30:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 37 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-25 15:30:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:30:12,235 INFO L225 Difference]: With dead ends: 156 [2022-11-25 15:30:12,235 INFO L226 Difference]: Without dead ends: 156 [2022-11-25 15:30:12,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=436, Invalid=4682, Unknown=2, NotChecked=282, Total=5402 [2022-11-25 15:30:12,238 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 512 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:30:12,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1391 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 15:30:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-25 15:30:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 120. [2022-11-25 15:30:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.3) internal successors, (130), 115 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:30:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2022-11-25 15:30:12,242 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 41 [2022-11-25 15:30:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:30:12,243 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2022-11-25 15:30:12,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 37 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 15:30:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2022-11-25 15:30:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:30:12,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:30:12,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:12,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:12,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:12,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:30:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1471699153, now seen corresponding path program 1 times [2022-11-25 15:30:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187497501] [2022-11-25 15:30:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:12,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:12,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:30:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:30:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:30:12,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:12,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187497501] [2022-11-25 15:30:12,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187497501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:30:12,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:30:12,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:30:12,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640844707] [2022-11-25 15:30:12,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:30:12,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:30:12,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:30:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:30:12,548 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:30:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:30:12,632 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-11-25 15:30:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:30:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-25 15:30:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:30:12,634 INFO L225 Difference]: With dead ends: 118 [2022-11-25 15:30:12,634 INFO L226 Difference]: Without dead ends: 118 [2022-11-25 15:30:12,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:30:12,635 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 68 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:30:12,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 105 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:30:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-25 15:30:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-25 15:30:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 100 states have (on average 1.27) internal successors, (127), 113 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:30:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2022-11-25 15:30:12,640 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 41 [2022-11-25 15:30:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:30:12,641 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2022-11-25 15:30:12,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:30:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2022-11-25 15:30:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 15:30:12,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:30:12,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:12,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 15:30:12,642 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:30:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1621966843, now seen corresponding path program 1 times [2022-11-25 15:30:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:12,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43997790] [2022-11-25 15:30:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:13,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:30:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:30:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:13,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:13,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43997790] [2022-11-25 15:30:13,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43997790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492167667] [2022-11-25 15:30:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:13,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:13,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:13,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:30:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 15:30:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:13,841 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 15:30:14,020 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:30:14,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 15:30:14,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:30:14,214 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 15:30:14,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-25 15:30:14,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-25 15:30:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:14,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:14,996 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 21 [2022-11-25 15:30:15,198 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1835 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1835))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (not (= (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse0)))))) is different from false [2022-11-25 15:30:15,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:15,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 45 [2022-11-25 15:30:15,371 INFO L321 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-11-25 15:30:15,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 155 [2022-11-25 15:30:15,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:15,387 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 128 treesize of output 118 [2022-11-25 15:30:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 15:30:16,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492167667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:16,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 21] total 58 [2022-11-25 15:30:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128736998] [2022-11-25 15:30:16,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:16,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 15:30:16,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 15:30:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3019, Unknown=18, NotChecked=110, Total=3306 [2022-11-25 15:30:16,099 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 58 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 49 states have internal predecessors, (87), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 15:30:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:30:18,460 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2022-11-25 15:30:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:30:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 49 states have internal predecessors, (87), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2022-11-25 15:30:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:30:18,462 INFO L225 Difference]: With dead ends: 130 [2022-11-25 15:30:18,462 INFO L226 Difference]: Without dead ends: 130 [2022-11-25 15:30:18,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=387, Invalid=4429, Unknown=18, NotChecked=136, Total=4970 [2022-11-25 15:30:18,464 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 392 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:30:18,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1297 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1200 Invalid, 0 Unknown, 87 Unchecked, 1.1s Time] [2022-11-25 15:30:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-25 15:30:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2022-11-25 15:30:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 100 states have (on average 1.26) internal successors, (126), 113 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:30:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2022-11-25 15:30:18,467 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 42 [2022-11-25 15:30:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:30:18,468 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2022-11-25 15:30:18,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 49 states have internal predecessors, (87), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 15:30:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2022-11-25 15:30:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 15:30:18,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:30:18,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:18,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:30:18,669 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:30:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 408363075, now seen corresponding path program 1 times [2022-11-25 15:30:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012292421] [2022-11-25 15:30:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:19,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:30:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:19,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:30:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:19,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:19,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012292421] [2022-11-25 15:30:19,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012292421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078388729] [2022-11-25 15:30:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:19,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:19,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:19,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:19,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:30:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 15:30:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:19,666 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 23 treesize of output 15 [2022-11-25 15:30:19,918 INFO L321 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-25 15:30:19,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2022-11-25 15:30:19,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:30:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:19,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:20,375 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 39 treesize of output 31 [2022-11-25 15:30:20,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:20,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 43 [2022-11-25 15:30:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:20,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078388729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:20,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:20,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 33 [2022-11-25 15:30:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316979416] [2022-11-25 15:30:20,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:30:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:30:20,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:30:20,651 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:30:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:30:22,316 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-11-25 15:30:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 15:30:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-11-25 15:30:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:30:22,317 INFO L225 Difference]: With dead ends: 173 [2022-11-25 15:30:22,318 INFO L226 Difference]: Without dead ends: 173 [2022-11-25 15:30:22,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=2158, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 15:30:22,319 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 417 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:30:22,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 958 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:30:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-25 15:30:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2022-11-25 15:30:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 114 states have (on average 1.280701754385965) internal successors, (146), 127 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:30:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2022-11-25 15:30:22,323 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 46 [2022-11-25 15:30:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:30:22,324 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2022-11-25 15:30:22,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 15:30:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2022-11-25 15:30:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 15:30:22,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:30:22,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:30:22,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:30:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 15:30:22,531 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-25 15:30:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:30:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash 408415690, now seen corresponding path program 2 times [2022-11-25 15:30:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:30:22,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304930836] [2022-11-25 15:30:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:30:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:30:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:30:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:23,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:30:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:23,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304930836] [2022-11-25 15:30:23,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304930836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105751857] [2022-11-25 15:30:23,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:30:23,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:23,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:23,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:23,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd34fe3-bdb9-44cf-aae2-ceea383b1269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:30:23,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:30:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:30:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-25 15:30:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:23,849 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 15:30:24,207 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:30:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:30:24,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:30:24,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:30:24,529 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 15:30:24,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2022-11-25 15:30:24,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:30:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:30:25,251 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 15:30:25,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2022-11-25 15:30:25,494 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-25 15:30:25,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 31 [2022-11-25 15:30:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:30:25,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:30:26,945 INFO L321 Elim1Store]: treesize reduction 1142, result has 45.2 percent of original size [2022-11-25 15:30:26,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 5754 treesize of output 5559 [2022-11-25 15:30:27,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:27,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 5426 treesize of output 3826 [2022-11-25 15:30:27,604 INFO L321 Elim1Store]: treesize reduction 149, result has 51.3 percent of original size [2022-11-25 15:30:27,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 7820 treesize of output 6418 [2022-11-25 15:30:28,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:28,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 6240 treesize of output 5736