./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.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_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/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_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/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_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- 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 17:23:27,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:23:27,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:23:27,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:23:27,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:23:27,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:23:27,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:23:27,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:23:27,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:23:27,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:23:27,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:23:27,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:23:27,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:23:27,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:23:27,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:23:27,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:23:27,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:23:27,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:23:27,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:23:27,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:23:28,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:23:28,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:23:28,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:23:28,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:23:28,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:23:28,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:23:28,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:23:28,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:23:28,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:23:28,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:23:28,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:23:28,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:23:28,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:23:28,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:23:28,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:23:28,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:23:28,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:23:28,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:23:28,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:23:28,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:23:28,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:23:28,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:23:28,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:23:28,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:23:28,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:23:28,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:23:28,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:23:28,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:23:28,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:23:28,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:23:28,074 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:23:28,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:23:28,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:23:28,076 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:23:28,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:23:28,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:23:28,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:23:28,077 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:23:28,077 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:23:28,077 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:23:28,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:23:28,078 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:23:28,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:23:28,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:23:28,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:23:28,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:23:28,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:23:28,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:23:28,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:23:28,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:23:28,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:23:28,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:23:28,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:23:28,085 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:23:28,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:23:28,086 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_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2022-11-25 17:23:28,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:23:28,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:23:28,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:23:28,416 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:23:28,417 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:23:28,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-25 17:23:31,558 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:23:31,931 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:23:31,936 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-25 17:23:31,960 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/data/922a08668/935df8e04809492e9831af605f777a7a/FLAG0fed8c2d4 [2022-11-25 17:23:31,980 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/data/922a08668/935df8e04809492e9831af605f777a7a [2022-11-25 17:23:31,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:23:31,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:23:31,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:23:31,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:23:31,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:23:31,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:23:31" (1/1) ... [2022-11-25 17:23:31,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e8da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:31, skipping insertion in model container [2022-11-25 17:23:31,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:23:31" (1/1) ... [2022-11-25 17:23:32,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:23:32,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:23:32,527 WARN L623 FunctionHandler]: Unknown extern function abort [2022-11-25 17:23:32,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:23:32,571 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:23:32,609 WARN L623 FunctionHandler]: Unknown extern function abort [2022-11-25 17:23:32,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:23:32,660 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:23:32,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32 WrapperNode [2022-11-25 17:23:32,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:23:32,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:23:32,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:23:32,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:23:32,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,720 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2022-11-25 17:23:32,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:23:32,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:23:32,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:23:32,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:23:32,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,756 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:23:32,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:23:32,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:23:32,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:23:32,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (1/1) ... [2022-11-25 17:23:32,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:23:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:32,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:23:32,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:23:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-25 17:23:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-25 17:23:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:23:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:23:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:23:32,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:23:32,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:23:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:23:32,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 17:23:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:23:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:23:32,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:23:33,034 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:23:33,036 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:23:33,610 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:23:33,618 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:23:33,618 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:23:33,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:23:33 BoogieIcfgContainer [2022-11-25 17:23:33,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:23:33,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:23:33,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:23:33,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:23:33,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:23:31" (1/3) ... [2022-11-25 17:23:33,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd7f0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:23:33, skipping insertion in model container [2022-11-25 17:23:33,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:32" (2/3) ... [2022-11-25 17:23:33,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd7f0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:23:33, skipping insertion in model container [2022-11-25 17:23:33,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:23:33" (3/3) ... [2022-11-25 17:23:33,640 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2022-11-25 17:23:33,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:23:33,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-25 17:23:33,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:23:33,727 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;@1f5059e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:23:33,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-25 17:23:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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 17:23:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:23:33,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:33,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:23:33,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1044165707, now seen corresponding path program 1 times [2022-11-25 17:23:33,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:33,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746388428] [2022-11-25 17:23:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:33,937 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 17:23:33,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:33,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746388428] [2022-11-25 17:23:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746388428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:33,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:33,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164222084] [2022-11-25 17:23:33,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:33,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:23:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:23:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:23:33,996 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:34,044 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2022-11-25 17:23:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:23:34,046 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 17:23:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:34,057 INFO L225 Difference]: With dead ends: 147 [2022-11-25 17:23:34,057 INFO L226 Difference]: Without dead ends: 144 [2022-11-25 17:23:34,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:23:34,063 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:34,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-25 17:23:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-25 17:23:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.880952380952381) internal successors, (158), 140 states have internal predecessors, (158), 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 17:23:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2022-11-25 17:23:34,133 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 6 [2022-11-25 17:23:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:34,134 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2022-11-25 17:23:34,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2022-11-25 17:23:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:23:34,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:34,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:23:34,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash 594325856, now seen corresponding path program 1 times [2022-11-25 17:23:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:34,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566121759] [2022-11-25 17:23:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:34,325 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 17:23:34,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:34,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566121759] [2022-11-25 17:23:34,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566121759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:34,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:34,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081580226] [2022-11-25 17:23:34,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:34,329 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:34,406 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2022-11-25 17:23:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 17:23:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:34,408 INFO L225 Difference]: With dead ends: 286 [2022-11-25 17:23:34,408 INFO L226 Difference]: Without dead ends: 286 [2022-11-25 17:23:34,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:34,410 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:34,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 467 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-25 17:23:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 146. [2022-11-25 17:23:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 142 states have internal predecessors, (160), 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 17:23:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2022-11-25 17:23:34,421 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 8 [2022-11-25 17:23:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:34,421 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2022-11-25 17:23:34,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2022-11-25 17:23:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:23:34,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:34,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:34,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:23:34,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash 592478814, now seen corresponding path program 1 times [2022-11-25 17:23:34,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:34,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124555434] [2022-11-25 17:23:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:34,674 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 17:23:34,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:34,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124555434] [2022-11-25 17:23:34,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124555434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:34,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208374869] [2022-11-25 17:23:34,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:34,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:34,679 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:34,939 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2022-11-25 17:23:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 17:23:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:34,941 INFO L225 Difference]: With dead ends: 266 [2022-11-25 17:23:34,942 INFO L226 Difference]: Without dead ends: 266 [2022-11-25 17:23:34,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:34,943 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:34,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-25 17:23:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2022-11-25 17:23:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.8592592592592592) internal successors, (251), 192 states have internal predecessors, (251), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 17:23:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2022-11-25 17:23:34,957 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 8 [2022-11-25 17:23:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:34,957 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2022-11-25 17:23:34,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2022-11-25 17:23:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:23:34,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:34,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:34,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:23:34,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash 592478813, now seen corresponding path program 1 times [2022-11-25 17:23:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257494628] [2022-11-25 17:23:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:35,010 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 17:23:35,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257494628] [2022-11-25 17:23:35,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257494628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:35,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:35,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:23:35,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023303711] [2022-11-25 17:23:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:35,014 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:35,192 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2022-11-25 17:23:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 17:23:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:35,196 INFO L225 Difference]: With dead ends: 381 [2022-11-25 17:23:35,196 INFO L226 Difference]: Without dead ends: 381 [2022-11-25 17:23:35,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 17:23:35,209 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 142 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:35,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 211 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-25 17:23:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 280. [2022-11-25 17:23:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2022-11-25 17:23:35,237 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2022-11-25 17:23:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:35,237 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2022-11-25 17:23:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2022-11-25 17:23:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:23:35,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:35,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:23:35,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash 592478876, now seen corresponding path program 1 times [2022-11-25 17:23:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:35,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904533680] [2022-11-25 17:23:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:35,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:35,369 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 17:23:35,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904533680] [2022-11-25 17:23:35,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904533680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:35,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:35,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:35,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188858258] [2022-11-25 17:23:35,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:35,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:35,371 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:35,574 INFO L93 Difference]: Finished difference Result 351 states and 440 transitions. [2022-11-25 17:23:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 17:23:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:35,576 INFO L225 Difference]: With dead ends: 351 [2022-11-25 17:23:35,576 INFO L226 Difference]: Without dead ends: 351 [2022-11-25 17:23:35,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:35,577 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:35,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 365 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-25 17:23:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 280. [2022-11-25 17:23:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2022-11-25 17:23:35,589 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2022-11-25 17:23:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:35,590 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2022-11-25 17:23:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2022-11-25 17:23:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:23:35,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:35,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:23:35,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058665, now seen corresponding path program 1 times [2022-11-25 17:23:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412590302] [2022-11-25 17:23:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:35,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:35,621 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 17:23:35,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:35,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412590302] [2022-11-25 17:23:35,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412590302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:35,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:35,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:35,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25940355] [2022-11-25 17:23:35,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:35,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:35,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:35,624 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:35,641 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2022-11-25 17:23:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 17:23:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:35,643 INFO L225 Difference]: With dead ends: 383 [2022-11-25 17:23:35,644 INFO L226 Difference]: Without dead ends: 383 [2022-11-25 17:23:35,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:35,644 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:35,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-25 17:23:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 282. [2022-11-25 17:23:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 213 states have (on average 1.7887323943661972) internal successors, (381), 271 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 397 transitions. [2022-11-25 17:23:35,654 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 397 transitions. Word has length 11 [2022-11-25 17:23:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 397 transitions. [2022-11-25 17:23:35,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 397 transitions. [2022-11-25 17:23:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 17:23:35,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:35,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:23:35,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 683754949, now seen corresponding path program 1 times [2022-11-25 17:23:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259256635] [2022-11-25 17:23:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:35,680 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 17:23:35,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259256635] [2022-11-25 17:23:35,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259256635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:35,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:35,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533286800] [2022-11-25 17:23:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:35,683 INFO L87 Difference]: Start difference. First operand 282 states and 397 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:35,810 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2022-11-25 17:23:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 17:23:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:35,812 INFO L225 Difference]: With dead ends: 337 [2022-11-25 17:23:35,812 INFO L226 Difference]: Without dead ends: 330 [2022-11-25 17:23:35,812 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 17:23:35,813 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:35,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 239 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-25 17:23:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2022-11-25 17:23:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.7904761904761906) internal successors, (376), 268 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2022-11-25 17:23:35,822 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 12 [2022-11-25 17:23:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:35,823 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2022-11-25 17:23:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2022-11-25 17:23:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 17:23:35,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:35,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:35,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:23:35,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:35,825 INFO L85 PathProgramCache]: Analyzing trace with hash -930261550, now seen corresponding path program 1 times [2022-11-25 17:23:35,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:35,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685667591] [2022-11-25 17:23:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:35,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:35,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:35,914 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 17:23:35,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:35,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685667591] [2022-11-25 17:23:35,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685667591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:35,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:35,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:23:35,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138695273] [2022-11-25 17:23:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:35,917 INFO L87 Difference]: Start difference. First operand 279 states and 392 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 17:23:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:35,943 INFO L93 Difference]: Finished difference Result 439 states and 602 transitions. [2022-11-25 17:23:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-25 17:23:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:35,946 INFO L225 Difference]: With dead ends: 439 [2022-11-25 17:23:35,947 INFO L226 Difference]: Without dead ends: 439 [2022-11-25 17:23:35,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:35,947 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 148 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:35,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 452 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-25 17:23:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2022-11-25 17:23:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.766355140186916) internal successors, (378), 272 states have internal predecessors, (378), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2022-11-25 17:23:35,957 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 14 [2022-11-25 17:23:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:35,957 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2022-11-25 17:23:35,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 17:23:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2022-11-25 17:23:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 17:23:35,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:35,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:35,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:23:35,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:35,959 INFO L85 PathProgramCache]: Analyzing trace with hash -120914924, now seen corresponding path program 1 times [2022-11-25 17:23:35,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:35,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792615088] [2022-11-25 17:23:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:36,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:36,020 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 17:23:36,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792615088] [2022-11-25 17:23:36,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792615088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:36,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:36,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380780659] [2022-11-25 17:23:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:36,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:36,022 INFO L87 Difference]: Start difference. First operand 283 states and 394 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 17:23:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:36,311 INFO L93 Difference]: Finished difference Result 406 states and 490 transitions. [2022-11-25 17:23:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-25 17:23:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:36,314 INFO L225 Difference]: With dead ends: 406 [2022-11-25 17:23:36,314 INFO L226 Difference]: Without dead ends: 406 [2022-11-25 17:23:36,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:36,315 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:36,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 357 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-25 17:23:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 283. [2022-11-25 17:23:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.7383177570093458) internal successors, (372), 272 states have internal predecessors, (372), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2022-11-25 17:23:36,323 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 14 [2022-11-25 17:23:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:36,323 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2022-11-25 17:23:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 17:23:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2022-11-25 17:23:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 17:23:36,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:36,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:23:36,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -120914923, now seen corresponding path program 1 times [2022-11-25 17:23:36,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:36,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550867696] [2022-11-25 17:23:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:36,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:36,604 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 17:23:36,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550867696] [2022-11-25 17:23:36,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550867696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:36,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:36,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:23:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614552972] [2022-11-25 17:23:36,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:23:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:23:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:36,607 INFO L87 Difference]: Start difference. First operand 283 states and 388 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 17:23:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:36,900 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2022-11-25 17:23:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:23:36,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2022-11-25 17:23:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:36,903 INFO L225 Difference]: With dead ends: 323 [2022-11-25 17:23:36,903 INFO L226 Difference]: Without dead ends: 323 [2022-11-25 17:23:36,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:23:36,904 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 97 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:36,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 609 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-25 17:23:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2022-11-25 17:23:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7293577981651376) internal successors, (377), 274 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2022-11-25 17:23:36,913 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 14 [2022-11-25 17:23:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:36,913 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2022-11-25 17:23:36,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 17:23:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2022-11-25 17:23:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 17:23:36,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:36,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:36,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:23:36,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256562, now seen corresponding path program 1 times [2022-11-25 17:23:36,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:36,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051074194] [2022-11-25 17:23:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:36,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,025 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 17:23:37,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051074194] [2022-11-25 17:23:37,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051074194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:37,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:37,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:37,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844611691] [2022-11-25 17:23:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:37,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:37,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:37,032 INFO L87 Difference]: Start difference. First operand 287 states and 393 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17:23:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:37,297 INFO L93 Difference]: Finished difference Result 466 states and 595 transitions. [2022-11-25 17:23:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17 [2022-11-25 17:23:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:37,300 INFO L225 Difference]: With dead ends: 466 [2022-11-25 17:23:37,300 INFO L226 Difference]: Without dead ends: 466 [2022-11-25 17:23:37,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:37,301 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:37,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 370 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-25 17:23:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 293. [2022-11-25 17:23:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.7098214285714286) internal successors, (383), 280 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2022-11-25 17:23:37,330 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 17 [2022-11-25 17:23:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:37,330 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2022-11-25 17:23:37,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17:23:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2022-11-25 17:23:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 17:23:37,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:37,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:37,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:23:37,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256563, now seen corresponding path program 1 times [2022-11-25 17:23:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:37,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102929231] [2022-11-25 17:23:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:37,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,457 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 17:23:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:37,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102929231] [2022-11-25 17:23:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102929231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:37,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:37,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460067116] [2022-11-25 17:23:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:37,459 INFO L87 Difference]: Start difference. First operand 293 states and 399 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17:23:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:37,655 INFO L93 Difference]: Finished difference Result 342 states and 419 transitions. [2022-11-25 17:23:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17 [2022-11-25 17:23:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:37,657 INFO L225 Difference]: With dead ends: 342 [2022-11-25 17:23:37,658 INFO L226 Difference]: Without dead ends: 342 [2022-11-25 17:23:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:37,658 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 178 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:37,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 374 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-25 17:23:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 293. [2022-11-25 17:23:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.6830357142857142) internal successors, (377), 280 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 393 transitions. [2022-11-25 17:23:37,666 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 393 transitions. Word has length 17 [2022-11-25 17:23:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 393 transitions. [2022-11-25 17:23:37,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17:23:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 393 transitions. [2022-11-25 17:23:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 17:23:37,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:37,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:23:37,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140034, now seen corresponding path program 1 times [2022-11-25 17:23:37,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:37,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389682680] [2022-11-25 17:23:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:37,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,708 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 17:23:37,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:37,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389682680] [2022-11-25 17:23:37,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389682680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:37,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:37,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:37,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948682372] [2022-11-25 17:23:37,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:37,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:37,710 INFO L87 Difference]: Start difference. First operand 293 states and 393 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 17:23:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:37,834 INFO L93 Difference]: Finished difference Result 385 states and 494 transitions. [2022-11-25 17:23:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20 [2022-11-25 17:23:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:37,836 INFO L225 Difference]: With dead ends: 385 [2022-11-25 17:23:37,836 INFO L226 Difference]: Without dead ends: 385 [2022-11-25 17:23:37,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:37,837 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:37,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 263 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-25 17:23:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 290. [2022-11-25 17:23:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 224 states have (on average 1.65625) internal successors, (371), 277 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2022-11-25 17:23:37,845 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 20 [2022-11-25 17:23:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:37,846 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2022-11-25 17:23:37,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 17:23:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2022-11-25 17:23:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 17:23:37,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:37,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:37,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:23:37,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140033, now seen corresponding path program 1 times [2022-11-25 17:23:37,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:37,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769359321] [2022-11-25 17:23:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,930 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 17:23:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:37,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769359321] [2022-11-25 17:23:37,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769359321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:37,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:37,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857159446] [2022-11-25 17:23:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:37,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:37,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:37,932 INFO L87 Difference]: Start difference. First operand 290 states and 387 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 17:23:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:38,137 INFO L93 Difference]: Finished difference Result 505 states and 618 transitions. [2022-11-25 17:23:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2022-11-25 17:23:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:38,139 INFO L225 Difference]: With dead ends: 505 [2022-11-25 17:23:38,140 INFO L226 Difference]: Without dead ends: 505 [2022-11-25 17:23:38,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:38,140 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 361 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:38,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 423 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-25 17:23:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 293. [2022-11-25 17:23:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 280 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2022-11-25 17:23:38,150 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 20 [2022-11-25 17:23:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:38,150 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2022-11-25 17:23:38,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 17:23:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2022-11-25 17:23:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:23:38,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:38,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:38,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:23:38,152 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1952233834, now seen corresponding path program 1 times [2022-11-25 17:23:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:38,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180032006] [2022-11-25 17:23:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:38,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:38,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:38,247 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 17:23:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:38,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180032006] [2022-11-25 17:23:38,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180032006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:38,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:38,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:38,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302909601] [2022-11-25 17:23:38,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:38,250 INFO L87 Difference]: Start difference. First operand 293 states and 389 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 17:23:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:38,515 INFO L93 Difference]: Finished difference Result 504 states and 616 transitions. [2022-11-25 17:23:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 21 [2022-11-25 17:23:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:38,518 INFO L225 Difference]: With dead ends: 504 [2022-11-25 17:23:38,518 INFO L226 Difference]: Without dead ends: 504 [2022-11-25 17:23:38,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:38,519 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 285 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:38,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 492 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-25 17:23:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 295. [2022-11-25 17:23:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 282 states have internal predecessors, (375), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2022-11-25 17:23:38,532 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 21 [2022-11-25 17:23:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:38,532 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2022-11-25 17:23:38,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 17:23:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2022-11-25 17:23:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:23:38,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:38,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:38,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:23:38,538 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1952289538, now seen corresponding path program 1 times [2022-11-25 17:23:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522417228] [2022-11-25 17:23:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:38,739 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 17:23:38,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522417228] [2022-11-25 17:23:38,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522417228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:38,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:38,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:23:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76177143] [2022-11-25 17:23:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:38,745 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 17:23:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:38,915 INFO L93 Difference]: Finished difference Result 328 states and 393 transitions. [2022-11-25 17:23:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:23:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2022-11-25 17:23:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:38,917 INFO L225 Difference]: With dead ends: 328 [2022-11-25 17:23:38,917 INFO L226 Difference]: Without dead ends: 328 [2022-11-25 17:23:38,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:23:38,918 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 337 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:38,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 991 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-25 17:23:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-11-25 17:23:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 282 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2022-11-25 17:23:38,927 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 21 [2022-11-25 17:23:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:38,927 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2022-11-25 17:23:38,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 17:23:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2022-11-25 17:23:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:23:38,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:38,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:38,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:23:38,929 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1952291460, now seen corresponding path program 1 times [2022-11-25 17:23:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:38,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160120102] [2022-11-25 17:23:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:39,057 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 17:23:39,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:39,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160120102] [2022-11-25 17:23:39,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160120102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:39,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:39,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:23:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251270238] [2022-11-25 17:23:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:39,060 INFO L87 Difference]: Start difference. First operand 295 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 17:23:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:39,197 INFO L93 Difference]: Finished difference Result 318 states and 379 transitions. [2022-11-25 17:23:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:23:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2022-11-25 17:23:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:39,199 INFO L225 Difference]: With dead ends: 318 [2022-11-25 17:23:39,200 INFO L226 Difference]: Without dead ends: 318 [2022-11-25 17:23:39,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:23:39,201 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 326 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:39,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 998 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-25 17:23:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2022-11-25 17:23:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 222 states have (on average 1.617117117117117) internal successors, (359), 272 states have internal predecessors, (359), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:23:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 375 transitions. [2022-11-25 17:23:39,209 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 375 transitions. Word has length 21 [2022-11-25 17:23:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:39,209 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 375 transitions. [2022-11-25 17:23:39,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 17:23:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 375 transitions. [2022-11-25 17:23:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 17:23:39,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:39,210 INFO L195 NwaCegarLoop]: trace histogram [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 17:23:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:23:39,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1056785802, now seen corresponding path program 1 times [2022-11-25 17:23:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:39,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409413696] [2022-11-25 17:23:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:39,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:39,764 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 17:23:39,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409413696] [2022-11-25 17:23:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409413696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:39,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:39,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 17:23:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737646162] [2022-11-25 17:23:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:39,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:23:39,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:23:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:23:39,768 INFO L87 Difference]: Start difference. First operand 285 states and 375 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 17:23:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:40,662 INFO L93 Difference]: Finished difference Result 398 states and 505 transitions. [2022-11-25 17:23:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:23:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 23 [2022-11-25 17:23:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:40,668 INFO L225 Difference]: With dead ends: 398 [2022-11-25 17:23:40,668 INFO L226 Difference]: Without dead ends: 396 [2022-11-25 17:23:40,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:23:40,669 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 234 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:40,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 805 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:23:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-25 17:23:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 337. [2022-11-25 17:23:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 269 states have (on average 1.5910780669144982) internal successors, (428), 320 states have internal predecessors, (428), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:23:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 450 transitions. [2022-11-25 17:23:40,679 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 450 transitions. Word has length 23 [2022-11-25 17:23:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:40,679 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 450 transitions. [2022-11-25 17:23:40,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 17:23:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 450 transitions. [2022-11-25 17:23:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:23:40,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:40,681 INFO L195 NwaCegarLoop]: trace histogram [1, 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 17:23:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:23:40,681 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233503, now seen corresponding path program 1 times [2022-11-25 17:23:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:40,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696400384] [2022-11-25 17:23:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:40,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:40,748 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 17:23:40,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696400384] [2022-11-25 17:23:40,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696400384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:40,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:40,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:40,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187922241] [2022-11-25 17:23:40,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:40,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:40,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:40,750 INFO L87 Difference]: Start difference. First operand 337 states and 450 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 17:23:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:40,996 INFO L93 Difference]: Finished difference Result 504 states and 649 transitions. [2022-11-25 17:23:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:23:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 25 [2022-11-25 17:23:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:40,999 INFO L225 Difference]: With dead ends: 504 [2022-11-25 17:23:40,999 INFO L226 Difference]: Without dead ends: 504 [2022-11-25 17:23:40,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:41,000 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 224 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:41,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 354 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-25 17:23:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 361. [2022-11-25 17:23:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.6245733788395904) internal successors, (476), 344 states have internal predecessors, (476), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:23:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2022-11-25 17:23:41,010 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 25 [2022-11-25 17:23:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:41,010 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2022-11-25 17:23:41,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 17:23:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2022-11-25 17:23:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:23:41,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:41,012 INFO L195 NwaCegarLoop]: trace histogram [1, 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 17:23:41,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:23:41,012 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233502, now seen corresponding path program 1 times [2022-11-25 17:23:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:41,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269550670] [2022-11-25 17:23:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:41,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:41,268 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 17:23:41,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:41,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269550670] [2022-11-25 17:23:41,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269550670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:41,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:41,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:23:41,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628318503] [2022-11-25 17:23:41,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:41,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:23:41,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:23:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:41,271 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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 17:23:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:41,581 INFO L93 Difference]: Finished difference Result 412 states and 520 transitions. [2022-11-25 17:23:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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 25 [2022-11-25 17:23:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:41,584 INFO L225 Difference]: With dead ends: 412 [2022-11-25 17:23:41,584 INFO L226 Difference]: Without dead ends: 412 [2022-11-25 17:23:41,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:23:41,585 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 331 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:41,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 434 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-25 17:23:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 361. [2022-11-25 17:23:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.583617747440273) internal successors, (464), 344 states have internal predecessors, (464), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:23:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 486 transitions. [2022-11-25 17:23:41,594 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 486 transitions. Word has length 25 [2022-11-25 17:23:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:41,595 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 486 transitions. [2022-11-25 17:23:41,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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 17:23:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 486 transitions. [2022-11-25 17:23:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:23:41,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:41,596 INFO L195 NwaCegarLoop]: trace histogram [1, 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 17:23:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:23:41,596 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash 456369005, now seen corresponding path program 1 times [2022-11-25 17:23:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:41,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748684987] [2022-11-25 17:23:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:41,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:41,990 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 17:23:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748684987] [2022-11-25 17:23:41,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748684987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:41,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:41,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:23:41,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841364703] [2022-11-25 17:23:41,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:41,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:23:41,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:41,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:23:41,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:23:41,994 INFO L87 Difference]: Start difference. First operand 361 states and 486 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 17:23:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:42,435 INFO L93 Difference]: Finished difference Result 639 states and 825 transitions. [2022-11-25 17:23:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:23:42,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 25 [2022-11-25 17:23:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:42,438 INFO L225 Difference]: With dead ends: 639 [2022-11-25 17:23:42,438 INFO L226 Difference]: Without dead ends: 639 [2022-11-25 17:23:42,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:23:42,439 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 504 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:42,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1099 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-25 17:23:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 423. [2022-11-25 17:23:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 352 states have (on average 1.5482954545454546) internal successors, (545), 403 states have internal predecessors, (545), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 17:23:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 571 transitions. [2022-11-25 17:23:42,451 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 571 transitions. Word has length 25 [2022-11-25 17:23:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:42,451 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 571 transitions. [2022-11-25 17:23:42,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 17:23:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 571 transitions. [2022-11-25 17:23:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:23:42,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:42,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 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 17:23:42,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:23:42,453 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:42,453 INFO L85 PathProgramCache]: Analyzing trace with hash 484106160, now seen corresponding path program 1 times [2022-11-25 17:23:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:42,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550319700] [2022-11-25 17:23:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:42,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:42,670 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 17:23:42,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550319700] [2022-11-25 17:23:42,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550319700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:42,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:42,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:23:42,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815156672] [2022-11-25 17:23:42,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:42,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:42,673 INFO L87 Difference]: Start difference. First operand 423 states and 571 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 17:23:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:43,031 INFO L93 Difference]: Finished difference Result 532 states and 666 transitions. [2022-11-25 17:23:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:23:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 27 [2022-11-25 17:23:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:43,033 INFO L225 Difference]: With dead ends: 532 [2022-11-25 17:23:43,034 INFO L226 Difference]: Without dead ends: 532 [2022-11-25 17:23:43,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:23:43,034 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 948 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:43,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 342 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-25 17:23:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 439. [2022-11-25 17:23:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 373 states have (on average 1.5308310991957104) internal successors, (571), 418 states have internal predecessors, (571), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:23:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 599 transitions. [2022-11-25 17:23:43,048 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 599 transitions. Word has length 27 [2022-11-25 17:23:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:43,048 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 599 transitions. [2022-11-25 17:23:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 17:23:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 599 transitions. [2022-11-25 17:23:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 17:23:43,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:43,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 17:23:43,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 17:23:43,050 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1109766870, now seen corresponding path program 1 times [2022-11-25 17:23:43,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:43,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170338579] [2022-11-25 17:23:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,189 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 17:23:43,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:43,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170338579] [2022-11-25 17:23:43,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170338579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:43,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:43,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:23:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539319617] [2022-11-25 17:23:43,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:43,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:43,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:43,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:43,192 INFO L87 Difference]: Start difference. First operand 439 states and 599 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, (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 17:23:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:43,536 INFO L93 Difference]: Finished difference Result 691 states and 907 transitions. [2022-11-25 17:23:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:23:43,537 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, (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 28 [2022-11-25 17:23:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:43,540 INFO L225 Difference]: With dead ends: 691 [2022-11-25 17:23:43,541 INFO L226 Difference]: Without dead ends: 691 [2022-11-25 17:23:43,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:23:43,542 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 466 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:43,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 939 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-11-25 17:23:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 436. [2022-11-25 17:23:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 373 states have (on average 1.5040214477211795) internal successors, (561), 415 states have internal predecessors, (561), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:23:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 589 transitions. [2022-11-25 17:23:43,560 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 589 transitions. Word has length 28 [2022-11-25 17:23:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:43,560 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 589 transitions. [2022-11-25 17:23:43,561 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, (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 17:23:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 589 transitions. [2022-11-25 17:23:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 17:23:43,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:43,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 17:23:43,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 17:23:43,563 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2122389103, now seen corresponding path program 1 times [2022-11-25 17:23:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:43,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689072920] [2022-11-25 17:23:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:43,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,728 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 17:23:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689072920] [2022-11-25 17:23:43,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689072920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:43,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:43,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:23:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639956753] [2022-11-25 17:23:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:43,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:23:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:23:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:43,734 INFO L87 Difference]: Start difference. First operand 436 states and 589 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 17:23:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:43,871 INFO L93 Difference]: Finished difference Result 459 states and 587 transitions. [2022-11-25 17:23:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:23:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 28 [2022-11-25 17:23:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:43,875 INFO L225 Difference]: With dead ends: 459 [2022-11-25 17:23:43,875 INFO L226 Difference]: Without dead ends: 459 [2022-11-25 17:23:43,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:23:43,877 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 522 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:43,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 437 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-25 17:23:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2022-11-25 17:23:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4932975871313674) internal successors, (557), 413 states have internal predecessors, (557), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:23:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 585 transitions. [2022-11-25 17:23:43,891 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 585 transitions. Word has length 28 [2022-11-25 17:23:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:43,891 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 585 transitions. [2022-11-25 17:23:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 17:23:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 585 transitions. [2022-11-25 17:23:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:23:43,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:43,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 17:23:43,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 17:23:43,893 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash -43057304, now seen corresponding path program 1 times [2022-11-25 17:23:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:43,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408767221] [2022-11-25 17:23:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:43,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:44,048 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 17:23:44,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:44,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408767221] [2022-11-25 17:23:44,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408767221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:44,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:44,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:23:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853086481] [2022-11-25 17:23:44,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:44,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:23:44,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:44,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:23:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:44,051 INFO L87 Difference]: Start difference. First operand 434 states and 585 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 17:23:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:44,220 INFO L93 Difference]: Finished difference Result 493 states and 639 transitions. [2022-11-25 17:23:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 29 [2022-11-25 17:23:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:44,222 INFO L225 Difference]: With dead ends: 493 [2022-11-25 17:23:44,222 INFO L226 Difference]: Without dead ends: 493 [2022-11-25 17:23:44,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:44,223 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 154 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:44,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 520 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-25 17:23:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 434. [2022-11-25 17:23:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4879356568364612) internal successors, (555), 413 states have internal predecessors, (555), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:23:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 583 transitions. [2022-11-25 17:23:44,234 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 583 transitions. Word has length 29 [2022-11-25 17:23:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:44,234 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 583 transitions. [2022-11-25 17:23:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 17:23:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 583 transitions. [2022-11-25 17:23:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:23:44,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:44,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 17:23:44,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 17:23:44,236 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1334068214, now seen corresponding path program 1 times [2022-11-25 17:23:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:44,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295256838] [2022-11-25 17:23:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:44,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:44,603 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 17:23:44,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:44,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295256838] [2022-11-25 17:23:44,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295256838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:44,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:44,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:23:44,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320614932] [2022-11-25 17:23:44,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:23:44,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:44,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:23:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:44,607 INFO L87 Difference]: Start difference. First operand 434 states and 583 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 17:23:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:44,874 INFO L93 Difference]: Finished difference Result 475 states and 613 transitions. [2022-11-25 17:23:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 30 [2022-11-25 17:23:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:44,876 INFO L225 Difference]: With dead ends: 475 [2022-11-25 17:23:44,876 INFO L226 Difference]: Without dead ends: 475 [2022-11-25 17:23:44,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:23:44,877 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:44,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 657 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-25 17:23:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2022-11-25 17:23:44,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 367 states have (on average 1.4741144414168936) internal successors, (541), 407 states have internal predecessors, (541), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:23:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 569 transitions. [2022-11-25 17:23:44,888 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 569 transitions. Word has length 30 [2022-11-25 17:23:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:44,888 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 569 transitions. [2022-11-25 17:23:44,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 17:23:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 569 transitions. [2022-11-25 17:23:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:23:44,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:44,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 17:23:44,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 17:23:44,890 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1334776215, now seen corresponding path program 1 times [2022-11-25 17:23:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:44,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796935449] [2022-11-25 17:23:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:45,066 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 17:23:45,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796935449] [2022-11-25 17:23:45,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796935449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:45,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:45,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:23:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707693438] [2022-11-25 17:23:45,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:45,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:23:45,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:23:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:45,069 INFO L87 Difference]: Start difference. First operand 428 states and 569 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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 17:23:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:45,284 INFO L93 Difference]: Finished difference Result 534 states and 690 transitions. [2022-11-25 17:23:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:23:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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 30 [2022-11-25 17:23:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:45,286 INFO L225 Difference]: With dead ends: 534 [2022-11-25 17:23:45,286 INFO L226 Difference]: Without dead ends: 534 [2022-11-25 17:23:45,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:45,287 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 147 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:45,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 473 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-25 17:23:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 468. [2022-11-25 17:23:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 404 states have (on average 1.4678217821782178) internal successors, (593), 445 states have internal predecessors, (593), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 17:23:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 625 transitions. [2022-11-25 17:23:45,298 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 625 transitions. Word has length 30 [2022-11-25 17:23:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:45,299 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 625 transitions. [2022-11-25 17:23:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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 17:23:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 625 transitions. [2022-11-25 17:23:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:23:45,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:45,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 17:23:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 17:23:45,300 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash -493536303, now seen corresponding path program 1 times [2022-11-25 17:23:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:45,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967468132] [2022-11-25 17:23:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:45,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:45,554 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 17:23:45,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:45,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967468132] [2022-11-25 17:23:45,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967468132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:45,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:45,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:23:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121513377] [2022-11-25 17:23:45,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:23:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:23:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:23:45,557 INFO L87 Difference]: Start difference. First operand 468 states and 625 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 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 17:23:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:45,986 INFO L93 Difference]: Finished difference Result 555 states and 683 transitions. [2022-11-25 17:23:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:23:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 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 30 [2022-11-25 17:23:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:46,010 INFO L225 Difference]: With dead ends: 555 [2022-11-25 17:23:46,010 INFO L226 Difference]: Without dead ends: 555 [2022-11-25 17:23:46,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:23:46,011 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 793 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:46,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 344 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-25 17:23:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 469. [2022-11-25 17:23:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 406 states have (on average 1.458128078817734) internal successors, (592), 445 states have internal predecessors, (592), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 17:23:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 626 transitions. [2022-11-25 17:23:46,023 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 626 transitions. Word has length 30 [2022-11-25 17:23:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:46,024 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 626 transitions. [2022-11-25 17:23:46,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 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 17:23:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 626 transitions. [2022-11-25 17:23:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 17:23:46,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:46,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 17:23:46,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1475285643, now seen corresponding path program 1 times [2022-11-25 17:23:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:46,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351809935] [2022-11-25 17:23:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:46,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:46,253 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 17:23:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351809935] [2022-11-25 17:23:46,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351809935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:46,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:46,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:23:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727646808] [2022-11-25 17:23:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:23:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:23:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:46,257 INFO L87 Difference]: Start difference. First operand 469 states and 626 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 17:23:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:46,833 INFO L93 Difference]: Finished difference Result 893 states and 1179 transitions. [2022-11-25 17:23:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:23:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 32 [2022-11-25 17:23:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:46,837 INFO L225 Difference]: With dead ends: 893 [2022-11-25 17:23:46,838 INFO L226 Difference]: Without dead ends: 893 [2022-11-25 17:23:46,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:23:46,838 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 340 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:46,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 754 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:23:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-25 17:23:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 544. [2022-11-25 17:23:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 475 states have (on average 1.4442105263157894) internal successors, (686), 516 states have internal predecessors, (686), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 17:23:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 728 transitions. [2022-11-25 17:23:46,862 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 728 transitions. Word has length 32 [2022-11-25 17:23:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:46,862 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 728 transitions. [2022-11-25 17:23:46,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 17:23:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 728 transitions. [2022-11-25 17:23:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:23:46,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:46,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:46,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 17:23:46,864 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1918246339, now seen corresponding path program 1 times [2022-11-25 17:23:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:46,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849252662] [2022-11-25 17:23:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:46,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:23:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:46,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849252662] [2022-11-25 17:23:46,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849252662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:46,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570241786] [2022-11-25 17:23:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:46,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:46,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:46,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:46,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:23:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:47,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:23:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:23:47,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:47,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570241786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:47,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:23:47,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 17:23:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770466322] [2022-11-25 17:23:47,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:47,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:47,144 INFO L87 Difference]: Start difference. First operand 544 states and 728 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 17:23:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:47,153 INFO L93 Difference]: Finished difference Result 553 states and 736 transitions. [2022-11-25 17:23:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-11-25 17:23:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:47,156 INFO L225 Difference]: With dead ends: 553 [2022-11-25 17:23:47,156 INFO L226 Difference]: Without dead ends: 552 [2022-11-25 17:23:47,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:47,157 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:47,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-11-25 17:23:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 548. [2022-11-25 17:23:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4384133611691023) internal successors, (689), 520 states have internal predecessors, (689), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 17:23:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 731 transitions. [2022-11-25 17:23:47,170 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 731 transitions. Word has length 33 [2022-11-25 17:23:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:47,170 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 731 transitions. [2022-11-25 17:23:47,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 17:23:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 731 transitions. [2022-11-25 17:23:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:23:47,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:47,171 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] [2022-11-25 17:23:47,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:23:47,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:47,377 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1559072507, now seen corresponding path program 1 times [2022-11-25 17:23:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:47,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355726] [2022-11-25 17:23:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:23:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:23:48,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355726] [2022-11-25 17:23:48,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:48,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:48,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:23:48,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023018036] [2022-11-25 17:23:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:48,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:23:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:23:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:23:48,007 INFO L87 Difference]: Start difference. First operand 548 states and 731 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 17:23:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:48,809 INFO L93 Difference]: Finished difference Result 555 states and 726 transitions. [2022-11-25 17:23:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:23:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 33 [2022-11-25 17:23:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:48,811 INFO L225 Difference]: With dead ends: 555 [2022-11-25 17:23:48,811 INFO L226 Difference]: Without dead ends: 553 [2022-11-25 17:23:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:23:48,812 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 196 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:48,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 857 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-25 17:23:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 505. [2022-11-25 17:23:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4328018223234624) internal successors, (629), 479 states have internal predecessors, (629), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 17:23:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 667 transitions. [2022-11-25 17:23:48,831 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 667 transitions. Word has length 33 [2022-11-25 17:23:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:48,832 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 667 transitions. [2022-11-25 17:23:48,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 17:23:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 667 transitions. [2022-11-25 17:23:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:23:48,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:48,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:48,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 17:23:48,833 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1510785108, now seen corresponding path program 1 times [2022-11-25 17:23:48,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:48,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246298165] [2022-11-25 17:23:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:48,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:49,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:49,218 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 17:23:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:49,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246298165] [2022-11-25 17:23:49,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246298165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:49,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:49,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:23:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047014133] [2022-11-25 17:23:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:49,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:49,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:49,221 INFO L87 Difference]: Start difference. First operand 505 states and 667 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 17:23:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:49,676 INFO L93 Difference]: Finished difference Result 566 states and 708 transitions. [2022-11-25 17:23:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:23:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 33 [2022-11-25 17:23:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:49,679 INFO L225 Difference]: With dead ends: 566 [2022-11-25 17:23:49,679 INFO L226 Difference]: Without dead ends: 566 [2022-11-25 17:23:49,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:23:49,680 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 403 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:49,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 535 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-25 17:23:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 505. [2022-11-25 17:23:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4214123006833712) internal successors, (624), 479 states have internal predecessors, (624), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 17:23:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 662 transitions. [2022-11-25 17:23:49,691 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 662 transitions. Word has length 33 [2022-11-25 17:23:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:49,692 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 662 transitions. [2022-11-25 17:23:49,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 17:23:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 662 transitions. [2022-11-25 17:23:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:23:49,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:49,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 17:23:49,693 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 896646995, now seen corresponding path program 1 times [2022-11-25 17:23:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:49,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100676491] [2022-11-25 17:23:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:49,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:49,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:23:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:23:49,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100676491] [2022-11-25 17:23:49,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100676491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:49,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:49,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:49,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897735288] [2022-11-25 17:23:49,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:49,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:49,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:49,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:49,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:49,739 INFO L87 Difference]: Start difference. First operand 505 states and 662 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 17:23:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:49,749 INFO L93 Difference]: Finished difference Result 507 states and 664 transitions. [2022-11-25 17:23:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-25 17:23:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:49,751 INFO L225 Difference]: With dead ends: 507 [2022-11-25 17:23:49,751 INFO L226 Difference]: Without dead ends: 507 [2022-11-25 17:23:49,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 17:23:49,752 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:49,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-25 17:23:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-11-25 17:23:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 441 states have (on average 1.4195011337868482) internal successors, (626), 481 states have internal predecessors, (626), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 17:23:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 664 transitions. [2022-11-25 17:23:49,764 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 664 transitions. Word has length 41 [2022-11-25 17:23:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:49,764 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 664 transitions. [2022-11-25 17:23:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 17:23:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 664 transitions. [2022-11-25 17:23:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:23:49,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:49,765 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] [2022-11-25 17:23:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 17:23:49,766 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993621, now seen corresponding path program 1 times [2022-11-25 17:23:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:49,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824894076] [2022-11-25 17:23:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:50,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:23:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:50,354 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 17:23:50,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824894076] [2022-11-25 17:23:50,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824894076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239978218] [2022-11-25 17:23:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:50,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:50,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:50,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:23:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:50,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:23:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:50,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:51,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:51,065 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 32 treesize of output 36 [2022-11-25 17:23:51,318 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 17:23:51,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239978218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:51,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:51,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 23 [2022-11-25 17:23:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272705472] [2022-11-25 17:23:51,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:23:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:23:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:23:51,321 INFO L87 Difference]: Start difference. First operand 507 states and 664 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 17:23:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:52,042 INFO L93 Difference]: Finished difference Result 532 states and 664 transitions. [2022-11-25 17:23:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:23:52,043 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-11-25 17:23:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:52,045 INFO L225 Difference]: With dead ends: 532 [2022-11-25 17:23:52,045 INFO L226 Difference]: Without dead ends: 532 [2022-11-25 17:23:52,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:23:52,046 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1239 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:52,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 1574 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:23:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-25 17:23:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 504. [2022-11-25 17:23:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 439 states have (on average 1.4123006833712983) internal successors, (620), 479 states have internal predecessors, (620), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 17:23:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 658 transitions. [2022-11-25 17:23:52,058 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 658 transitions. Word has length 41 [2022-11-25 17:23:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:52,058 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 658 transitions. [2022-11-25 17:23:52,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 17:23:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 658 transitions. [2022-11-25 17:23:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 17:23:52,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:52,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:52,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:52,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:52,266 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1350180533, now seen corresponding path program 1 times [2022-11-25 17:23:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:52,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866972997] [2022-11-25 17:23:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:52,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:52,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:23:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:52,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866972997] [2022-11-25 17:23:52,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866972997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453880470] [2022-11-25 17:23:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:52,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:52,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:52,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:52,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:23:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:52,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:23:52,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:52,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:52,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453880470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:52,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:52,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 17:23:52,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909859695] [2022-11-25 17:23:52,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:23:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:23:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:23:52,632 INFO L87 Difference]: Start difference. First operand 504 states and 658 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 17:23:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:52,718 INFO L93 Difference]: Finished difference Result 1164 states and 1506 transitions. [2022-11-25 17:23:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:23:52,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-11-25 17:23:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:52,723 INFO L225 Difference]: With dead ends: 1164 [2022-11-25 17:23:52,723 INFO L226 Difference]: Without dead ends: 1164 [2022-11-25 17:23:52,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:23:52,724 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 718 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:52,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 722 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-25 17:23:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 666. [2022-11-25 17:23:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 595 states have (on average 1.3647058823529412) internal successors, (812), 635 states have internal predecessors, (812), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-25 17:23:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 862 transitions. [2022-11-25 17:23:52,767 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 862 transitions. Word has length 44 [2022-11-25 17:23:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:52,767 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 862 transitions. [2022-11-25 17:23:52,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 17:23:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 862 transitions. [2022-11-25 17:23:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 17:23:52,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:52,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:52,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:52,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:52,975 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash 649115955, now seen corresponding path program 1 times [2022-11-25 17:23:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:52,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856702666] [2022-11-25 17:23:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:53,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:53,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:23:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:53,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856702666] [2022-11-25 17:23:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856702666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548853173] [2022-11-25 17:23:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:53,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:53,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:23:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:23:53,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:53,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:53,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548853173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:53,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:23:53,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-11-25 17:23:53,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096079409] [2022-11-25 17:23:53,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:53,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:23:53,708 INFO L87 Difference]: Start difference. First operand 666 states and 862 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:23:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:54,046 INFO L93 Difference]: Finished difference Result 860 states and 1070 transitions. [2022-11-25 17:23:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-25 17:23:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:54,050 INFO L225 Difference]: With dead ends: 860 [2022-11-25 17:23:54,050 INFO L226 Difference]: Without dead ends: 860 [2022-11-25 17:23:54,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:23:54,055 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 457 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:54,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 412 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-25 17:23:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 663. [2022-11-25 17:23:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 595 states have (on average 1.3512605042016808) internal successors, (804), 632 states have internal predecessors, (804), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-25 17:23:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 854 transitions. [2022-11-25 17:23:54,076 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 854 transitions. Word has length 44 [2022-11-25 17:23:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:54,076 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 854 transitions. [2022-11-25 17:23:54,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:23:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 854 transitions. [2022-11-25 17:23:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 17:23:54,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:54,078 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 17:23:54,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:54,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:23:54,289 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1877190129, now seen corresponding path program 1 times [2022-11-25 17:23:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376513006] [2022-11-25 17:23:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:54,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:23:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 17:23:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376513006] [2022-11-25 17:23:54,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376513006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362381479] [2022-11-25 17:23:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:54,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:54,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:54,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:54,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:23:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:23:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:54,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:54,779 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 17:23:54,779 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 12 treesize of output 11 [2022-11-25 17:23:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:54,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362381479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:54,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:54,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-25 17:23:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156692320] [2022-11-25 17:23:54,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:54,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:23:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:54,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:23:54,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:23:54,809 INFO L87 Difference]: Start difference. First operand 663 states and 854 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 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 17:23:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:55,716 INFO L93 Difference]: Finished difference Result 2142 states and 2679 transitions. [2022-11-25 17:23:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:23:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 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 46 [2022-11-25 17:23:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:55,724 INFO L225 Difference]: With dead ends: 2142 [2022-11-25 17:23:55,724 INFO L226 Difference]: Without dead ends: 2142 [2022-11-25 17:23:55,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:23:55,725 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1770 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:55,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1030 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:23:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-11-25 17:23:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 851. [2022-11-25 17:23:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 775 states have (on average 1.2967741935483872) internal successors, (1005), 808 states have internal predecessors, (1005), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-25 17:23:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1077 transitions. [2022-11-25 17:23:55,761 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1077 transitions. Word has length 46 [2022-11-25 17:23:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:55,762 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1077 transitions. [2022-11-25 17:23:55,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 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 17:23:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1077 transitions. [2022-11-25 17:23:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:23:55,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:55,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:55,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:55,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:23:55,968 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:55,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969807, now seen corresponding path program 1 times [2022-11-25 17:23:55,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:55,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392299644] [2022-11-25 17:23:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:55,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392299644] [2022-11-25 17:23:56,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392299644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279805424] [2022-11-25 17:23:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:56,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:56,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:56,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:56,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:23:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:23:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:56,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:23:56,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279805424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:56,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2022-11-25 17:23:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010103193] [2022-11-25 17:23:56,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:56,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:56,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:56,311 INFO L87 Difference]: Start difference. First operand 851 states and 1077 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:23:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:56,383 INFO L93 Difference]: Finished difference Result 2768 states and 3486 transitions. [2022-11-25 17:23:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:23:56,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-25 17:23:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:56,392 INFO L225 Difference]: With dead ends: 2768 [2022-11-25 17:23:56,392 INFO L226 Difference]: Without dead ends: 2768 [2022-11-25 17:23:56,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:23:56,393 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 427 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:56,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 616 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2022-11-25 17:23:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1928. [2022-11-25 17:23:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1792 states have (on average 1.29296875) internal successors, (2317), 1829 states have internal predecessors, (2317), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 17:23:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2473 transitions. [2022-11-25 17:23:56,442 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2473 transitions. Word has length 45 [2022-11-25 17:23:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:56,442 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 2473 transitions. [2022-11-25 17:23:56,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:23:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2473 transitions. [2022-11-25 17:23:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:23:56,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:56,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:56,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:56,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:23:56,649 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816849, now seen corresponding path program 1 times [2022-11-25 17:23:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:56,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225398380] [2022-11-25 17:23:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:57,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:57,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225398380] [2022-11-25 17:23:57,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225398380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:57,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424445042] [2022-11-25 17:23:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:57,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:57,154 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:57,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:23:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:23:57,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:57,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:57,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424445042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:57,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:23:57,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-11-25 17:23:57,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874549550] [2022-11-25 17:23:57,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:57,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:57,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:57,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:57,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:23:57,660 INFO L87 Difference]: Start difference. First operand 1928 states and 2473 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 17:23:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:57,890 INFO L93 Difference]: Finished difference Result 1976 states and 2504 transitions. [2022-11-25 17:23:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2022-11-25 17:23:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:57,898 INFO L225 Difference]: With dead ends: 1976 [2022-11-25 17:23:57,898 INFO L226 Difference]: Without dead ends: 1976 [2022-11-25 17:23:57,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:23:57,899 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 419 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:57,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 397 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-25 17:23:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2022-11-25 17:23:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1794 states have (on average 1.2931995540691192) internal successors, (2320), 1831 states have internal predecessors, (2320), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 17:23:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2476 transitions. [2022-11-25 17:23:57,941 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2476 transitions. Word has length 45 [2022-11-25 17:23:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:57,941 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 2476 transitions. [2022-11-25 17:23:57,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 17:23:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2476 transitions. [2022-11-25 17:23:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:23:57,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:57,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:57,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:58,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:58,148 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816787, now seen corresponding path program 1 times [2022-11-25 17:23:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:58,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674507937] [2022-11-25 17:23:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:58,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:23:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:58,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:58,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674507937] [2022-11-25 17:23:58,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674507937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670861567] [2022-11-25 17:23:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:58,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:58,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:23:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:23:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:58,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:58,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670861567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:58,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:23:58,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-11-25 17:23:58,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652791230] [2022-11-25 17:23:58,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:58,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:58,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:23:58,829 INFO L87 Difference]: Start difference. First operand 1930 states and 2476 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 17:23:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:59,025 INFO L93 Difference]: Finished difference Result 1975 states and 2502 transitions. [2022-11-25 17:23:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2022-11-25 17:23:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:59,032 INFO L225 Difference]: With dead ends: 1975 [2022-11-25 17:23:59,033 INFO L226 Difference]: Without dead ends: 1975 [2022-11-25 17:23:59,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:23:59,034 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 427 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:59,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 354 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:23:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2022-11-25 17:23:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1927. [2022-11-25 17:23:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2918526785714286) internal successors, (2315), 1828 states have internal predecessors, (2315), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 17:23:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2471 transitions. [2022-11-25 17:23:59,083 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2471 transitions. Word has length 45 [2022-11-25 17:23:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:59,083 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2471 transitions. [2022-11-25 17:23:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 17:23:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2471 transitions. [2022-11-25 17:23:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:23:59,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:59,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:59,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 17:23:59,291 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:23:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1040806822, now seen corresponding path program 1 times [2022-11-25 17:23:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817279252] [2022-11-25 17:23:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:01,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:01,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817279252] [2022-11-25 17:24:01,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817279252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:01,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:01,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-25 17:24:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991664183] [2022-11-25 17:24:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:01,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:24:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:24:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:24:01,049 INFO L87 Difference]: Start difference. First operand 1927 states and 2471 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 17:24:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:02,151 INFO L93 Difference]: Finished difference Result 1976 states and 2523 transitions. [2022-11-25 17:24:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:24:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 48 [2022-11-25 17:24:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:02,158 INFO L225 Difference]: With dead ends: 1976 [2022-11-25 17:24:02,159 INFO L226 Difference]: Without dead ends: 1976 [2022-11-25 17:24:02,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:24:02,160 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 103 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:02,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 725 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:24:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-25 17:24:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1957. [2022-11-25 17:24:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1822 states have (on average 1.2892425905598244) internal successors, (2349), 1858 states have internal predecessors, (2349), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 17:24:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2505 transitions. [2022-11-25 17:24:02,201 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2505 transitions. Word has length 48 [2022-11-25 17:24:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:02,202 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 2505 transitions. [2022-11-25 17:24:02,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 17:24:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2505 transitions. [2022-11-25 17:24:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:24:02,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:02,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:02,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-25 17:24:02,204 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:02,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1279480752, now seen corresponding path program 1 times [2022-11-25 17:24:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418120149] [2022-11-25 17:24:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:02,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:02,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418120149] [2022-11-25 17:24:02,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418120149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:02,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:02,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:24:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114994359] [2022-11-25 17:24:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:24:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:24:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:24:02,513 INFO L87 Difference]: Start difference. First operand 1957 states and 2505 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 17:24:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:02,783 INFO L93 Difference]: Finished difference Result 2179 states and 2767 transitions. [2022-11-25 17:24:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:24:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 49 [2022-11-25 17:24:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:02,793 INFO L225 Difference]: With dead ends: 2179 [2022-11-25 17:24:02,799 INFO L226 Difference]: Without dead ends: 2179 [2022-11-25 17:24:02,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:24:02,800 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1225 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:02,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 899 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:24:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-11-25 17:24:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1927. [2022-11-25 17:24:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2756696428571428) internal successors, (2286), 1828 states have internal predecessors, (2286), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 17:24:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2442 transitions. [2022-11-25 17:24:02,847 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2442 transitions. Word has length 49 [2022-11-25 17:24:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:02,847 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2442 transitions. [2022-11-25 17:24:02,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 17:24:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2442 transitions. [2022-11-25 17:24:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:24:02,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:02,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-25 17:24:02,849 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225816, now seen corresponding path program 1 times [2022-11-25 17:24:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:02,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534273456] [2022-11-25 17:24:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:03,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:03,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534273456] [2022-11-25 17:24:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534273456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:03,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-25 17:24:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754994739] [2022-11-25 17:24:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:24:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:24:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:24:03,752 INFO L87 Difference]: Start difference. First operand 1927 states and 2442 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 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 17:24:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:04,847 INFO L93 Difference]: Finished difference Result 2078 states and 2605 transitions. [2022-11-25 17:24:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:24:04,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 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 49 [2022-11-25 17:24:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:04,853 INFO L225 Difference]: With dead ends: 2078 [2022-11-25 17:24:04,853 INFO L226 Difference]: Without dead ends: 2078 [2022-11-25 17:24:04,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:24:04,854 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1291 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:04,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1034 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:24:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-11-25 17:24:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1796. [2022-11-25 17:24:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1664 states have (on average 1.28125) internal successors, (2132), 1699 states have internal predecessors, (2132), 73 states have call successors, (73), 33 states have call predecessors, (73), 33 states have return successors, (73), 63 states have call predecessors, (73), 73 states have call successors, (73) [2022-11-25 17:24:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2278 transitions. [2022-11-25 17:24:04,888 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2278 transitions. Word has length 49 [2022-11-25 17:24:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:04,890 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2278 transitions. [2022-11-25 17:24:04,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 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 17:24:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2278 transitions. [2022-11-25 17:24:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:24:04,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:04,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:04,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-25 17:24:04,892 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225817, now seen corresponding path program 1 times [2022-11-25 17:24:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:04,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581579542] [2022-11-25 17:24:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581579542] [2022-11-25 17:24:06,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581579542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:06,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-25 17:24:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582291111] [2022-11-25 17:24:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:24:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:24:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:24:06,247 INFO L87 Difference]: Start difference. First operand 1796 states and 2278 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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 17:24:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:08,824 INFO L93 Difference]: Finished difference Result 2635 states and 3366 transitions. [2022-11-25 17:24:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:24:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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 49 [2022-11-25 17:24:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:08,836 INFO L225 Difference]: With dead ends: 2635 [2022-11-25 17:24:08,836 INFO L226 Difference]: Without dead ends: 2635 [2022-11-25 17:24:08,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=482, Invalid=1078, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:24:08,837 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2261 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:08,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2261 Valid, 1262 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:24:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-25 17:24:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2000. [2022-11-25 17:24:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1852 states have (on average 1.2975161987041037) internal successors, (2403), 1891 states have internal predecessors, (2403), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-25 17:24:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2569 transitions. [2022-11-25 17:24:08,881 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2569 transitions. Word has length 49 [2022-11-25 17:24:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:08,881 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 2569 transitions. [2022-11-25 17:24:08,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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 17:24:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2569 transitions. [2022-11-25 17:24:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:24:08,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:08,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:08,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-25 17:24:08,883 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072858, now seen corresponding path program 1 times [2022-11-25 17:24:08,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:08,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547218388] [2022-11-25 17:24:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:09,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:09,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:09,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547218388] [2022-11-25 17:24:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547218388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:09,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:09,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:24:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602931716] [2022-11-25 17:24:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:24:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:24:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:24:09,377 INFO L87 Difference]: Start difference. First operand 2000 states and 2569 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 17:24:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:10,142 INFO L93 Difference]: Finished difference Result 2610 states and 3303 transitions. [2022-11-25 17:24:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:24:10,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 49 [2022-11-25 17:24:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:10,154 INFO L225 Difference]: With dead ends: 2610 [2022-11-25 17:24:10,155 INFO L226 Difference]: Without dead ends: 2610 [2022-11-25 17:24:10,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:24:10,156 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 934 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:10,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1168 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:24:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2022-11-25 17:24:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2254. [2022-11-25 17:24:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2074 states have (on average 1.2974927675988428) internal successors, (2691), 2133 states have internal predecessors, (2691), 109 states have call successors, (109), 45 states have call predecessors, (109), 45 states have return successors, (109), 75 states have call predecessors, (109), 109 states have call successors, (109) [2022-11-25 17:24:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2909 transitions. [2022-11-25 17:24:10,200 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2909 transitions. Word has length 49 [2022-11-25 17:24:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:10,201 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 2909 transitions. [2022-11-25 17:24:10,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 17:24:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2909 transitions. [2022-11-25 17:24:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 17:24:10,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:10,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:10,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-25 17:24:10,203 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072859, now seen corresponding path program 1 times [2022-11-25 17:24:10,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:10,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981114066] [2022-11-25 17:24:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:10,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:11,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:11,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981114066] [2022-11-25 17:24:11,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981114066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:11,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:11,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:24:11,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646972499] [2022-11-25 17:24:11,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:11,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:24:11,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:24:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:24:11,015 INFO L87 Difference]: Start difference. First operand 2254 states and 2909 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 17:24:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:11,774 INFO L93 Difference]: Finished difference Result 2745 states and 3475 transitions. [2022-11-25 17:24:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:24:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 49 [2022-11-25 17:24:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:11,781 INFO L225 Difference]: With dead ends: 2745 [2022-11-25 17:24:11,781 INFO L226 Difference]: Without dead ends: 2745 [2022-11-25 17:24:11,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:24:11,782 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 946 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:11,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 883 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:24:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-25 17:24:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2447. [2022-11-25 17:24:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2251 states have (on average 1.3091959129275876) internal successors, (2947), 2314 states have internal predecessors, (2947), 119 states have call successors, (119), 51 states have call predecessors, (119), 51 states have return successors, (119), 81 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-25 17:24:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3185 transitions. [2022-11-25 17:24:11,830 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3185 transitions. Word has length 49 [2022-11-25 17:24:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:11,830 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3185 transitions. [2022-11-25 17:24:11,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 17:24:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3185 transitions. [2022-11-25 17:24:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 17:24:11,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:11,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:11,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-25 17:24:11,832 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash -7673948, now seen corresponding path program 1 times [2022-11-25 17:24:11,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:11,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135138253] [2022-11-25 17:24:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135138253] [2022-11-25 17:24:11,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135138253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846758587] [2022-11-25 17:24:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:11,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:11,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:11,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:24:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:12,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:24:12,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:12,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846758587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:12,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:24:12,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 17:24:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593793505] [2022-11-25 17:24:12,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:12,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:24:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:12,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:24:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:24:12,122 INFO L87 Difference]: Start difference. First operand 2447 states and 3185 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 17:24:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:12,153 INFO L93 Difference]: Finished difference Result 2964 states and 3885 transitions. [2022-11-25 17:24:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:24:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 50 [2022-11-25 17:24:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:12,159 INFO L225 Difference]: With dead ends: 2964 [2022-11-25 17:24:12,160 INFO L226 Difference]: Without dead ends: 2964 [2022-11-25 17:24:12,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:24:12,162 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 195 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:12,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:24:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2022-11-25 17:24:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2870. [2022-11-25 17:24:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2662 states have (on average 1.3260706235912847) internal successors, (3530), 2725 states have internal predecessors, (3530), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 93 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-25 17:24:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3792 transitions. [2022-11-25 17:24:12,222 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3792 transitions. Word has length 50 [2022-11-25 17:24:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:12,222 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 3792 transitions. [2022-11-25 17:24:12,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 17:24:12,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3792 transitions. [2022-11-25 17:24:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:24:12,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:12,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:12,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:12,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:12,429 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash -384530648, now seen corresponding path program 1 times [2022-11-25 17:24:12,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:12,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925017205] [2022-11-25 17:24:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:12,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:14,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:24:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:24:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925017205] [2022-11-25 17:24:14,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925017205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640113073] [2022-11-25 17:24:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:14,094 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:14,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:24:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 17:24:14,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:14,544 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:24:14,545 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 17:24:14,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:14,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:14,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:14,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:14,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:14,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:15,060 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:24:15,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-25 17:24:15,076 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-25 17:24:15,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:24:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:15,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:24:15,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:24:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:15,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2022-11-25 17:24:15,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:15,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-25 17:24:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:16,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:16,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-11-25 17:24:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:16,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:37,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640113073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:37,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:24:37,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-25 17:24:37,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267601106] [2022-11-25 17:24:37,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:37,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:24:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:24:37,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2382, Unknown=8, NotChecked=0, Total=2550 [2022-11-25 17:24:37,246 INFO L87 Difference]: Start difference. First operand 2870 states and 3792 transitions. Second operand has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 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 17:24:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:48,676 INFO L93 Difference]: Finished difference Result 3280 states and 4241 transitions. [2022-11-25 17:24:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 17:24:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 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 51 [2022-11-25 17:24:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:48,686 INFO L225 Difference]: With dead ends: 3280 [2022-11-25 17:24:48,686 INFO L226 Difference]: Without dead ends: 3276 [2022-11-25 17:24:48,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=1342, Invalid=8156, Unknown=8, NotChecked=0, Total=9506 [2022-11-25 17:24:48,693 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2302 mSDsluCounter, 4435 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 4602 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:48,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 4602 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 17:24:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2022-11-25 17:24:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2864. [2022-11-25 17:24:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2656 states have (on average 1.3226656626506024) internal successors, (3513), 2718 states have internal predecessors, (3513), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 94 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-25 17:24:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3775 transitions. [2022-11-25 17:24:48,760 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3775 transitions. Word has length 51 [2022-11-25 17:24:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:48,760 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 3775 transitions. [2022-11-25 17:24:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 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 17:24:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3775 transitions. [2022-11-25 17:24:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:24:48,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:48,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:48,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 17:24:48,970 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -987996839, now seen corresponding path program 1 times [2022-11-25 17:24:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:48,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070546786] [2022-11-25 17:24:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:24:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:49,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:49,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070546786] [2022-11-25 17:24:49,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070546786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:49,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:49,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:24:49,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707408732] [2022-11-25 17:24:49,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:49,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:24:49,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:24:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:24:49,085 INFO L87 Difference]: Start difference. First operand 2864 states and 3775 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 17:24:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:49,117 INFO L93 Difference]: Finished difference Result 3639 states and 4858 transitions. [2022-11-25 17:24:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:24:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 51 [2022-11-25 17:24:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:49,133 INFO L225 Difference]: With dead ends: 3639 [2022-11-25 17:24:49,133 INFO L226 Difference]: Without dead ends: 3639 [2022-11-25 17:24:49,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:24:49,134 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 116 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:49,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 441 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:24:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-11-25 17:24:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2490. [2022-11-25 17:24:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2306 states have (on average 1.303122289679098) internal successors, (3005), 2364 states have internal predecessors, (3005), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 17:24:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3237 transitions. [2022-11-25 17:24:49,193 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3237 transitions. Word has length 51 [2022-11-25 17:24:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:49,193 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3237 transitions. [2022-11-25 17:24:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 17:24:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3237 transitions. [2022-11-25 17:24:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 17:24:49,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:49,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:49,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-25 17:24:49,195 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1781712484, now seen corresponding path program 1 times [2022-11-25 17:24:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:49,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013030845] [2022-11-25 17:24:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:49,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:24:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:49,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:49,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013030845] [2022-11-25 17:24:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013030845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578509070] [2022-11-25 17:24:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:49,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:49,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:24:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:24:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:24:49,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 17:24:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:50,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:50,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578509070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:50,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:50,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2022-11-25 17:24:50,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152536346] [2022-11-25 17:24:50,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:50,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:24:50,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:24:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:24:50,273 INFO L87 Difference]: Start difference. First operand 2490 states and 3237 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:24:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:51,267 INFO L93 Difference]: Finished difference Result 3674 states and 4798 transitions. [2022-11-25 17:24:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:24:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-11-25 17:24:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:51,277 INFO L225 Difference]: With dead ends: 3674 [2022-11-25 17:24:51,278 INFO L226 Difference]: Without dead ends: 3666 [2022-11-25 17:24:51,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:24:51,280 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 470 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:51,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1382 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:24:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2022-11-25 17:24:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 2502. [2022-11-25 17:24:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2318 states have (on average 1.3002588438308886) internal successors, (3014), 2376 states have internal predecessors, (3014), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 17:24:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3246 transitions. [2022-11-25 17:24:51,339 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3246 transitions. Word has length 52 [2022-11-25 17:24:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:51,339 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 3246 transitions. [2022-11-25 17:24:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:24:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3246 transitions. [2022-11-25 17:24:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 17:24:51,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:51,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:51,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:51,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 17:24:51,547 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1216726984, now seen corresponding path program 1 times [2022-11-25 17:24:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:51,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604754418] [2022-11-25 17:24:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:52,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:52,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604754418] [2022-11-25 17:24:52,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604754418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:52,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:52,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 17:24:52,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999722776] [2022-11-25 17:24:52,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:52,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:24:52,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:24:52,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:24:52,471 INFO L87 Difference]: Start difference. First operand 2502 states and 3246 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 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 17:24:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:53,547 INFO L93 Difference]: Finished difference Result 2673 states and 3431 transitions. [2022-11-25 17:24:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:24:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 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 52 [2022-11-25 17:24:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:53,554 INFO L225 Difference]: With dead ends: 2673 [2022-11-25 17:24:53,555 INFO L226 Difference]: Without dead ends: 2673 [2022-11-25 17:24:53,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:24:53,558 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1207 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 917 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:24:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-11-25 17:24:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2516. [2022-11-25 17:24:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2332 states have (on average 1.300171526586621) internal successors, (3032), 2390 states have internal predecessors, (3032), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 17:24:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3264 transitions. [2022-11-25 17:24:53,607 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3264 transitions. Word has length 52 [2022-11-25 17:24:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:53,608 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3264 transitions. [2022-11-25 17:24:53,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 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 17:24:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3264 transitions. [2022-11-25 17:24:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 17:24:53,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:53,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:53,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-25 17:24:53,611 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 407380358, now seen corresponding path program 1 times [2022-11-25 17:24:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350726249] [2022-11-25 17:24:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:54,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:54,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350726249] [2022-11-25 17:24:54,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350726249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:54,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:54,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 17:24:54,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195728] [2022-11-25 17:24:54,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:54,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:24:54,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:24:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:24:54,153 INFO L87 Difference]: Start difference. First operand 2516 states and 3264 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 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 17:24:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:54,984 INFO L93 Difference]: Finished difference Result 2880 states and 3681 transitions. [2022-11-25 17:24:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:24:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 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 52 [2022-11-25 17:24:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:54,991 INFO L225 Difference]: With dead ends: 2880 [2022-11-25 17:24:54,991 INFO L226 Difference]: Without dead ends: 2880 [2022-11-25 17:24:54,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:24:54,992 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 984 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:54,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 894 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:24:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2022-11-25 17:24:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2503. [2022-11-25 17:24:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2319 states have (on average 1.3001293661060802) internal successors, (3015), 2377 states have internal predecessors, (3015), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 17:24:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3247 transitions. [2022-11-25 17:24:55,040 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3247 transitions. Word has length 52 [2022-11-25 17:24:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:55,042 INFO L495 AbstractCegarLoop]: Abstraction has 2503 states and 3247 transitions. [2022-11-25 17:24:55,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 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 17:24:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3247 transitions. [2022-11-25 17:24:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:24:55,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:55,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:55,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-25 17:24:55,044 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash -159124908, now seen corresponding path program 1 times [2022-11-25 17:24:55,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:55,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012958142] [2022-11-25 17:24:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:55,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:55,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:24:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:24:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:55,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012958142] [2022-11-25 17:24:55,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012958142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:55,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872412891] [2022-11-25 17:24:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:55,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:55,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:55,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:24:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:55,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:24:55,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:56,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:56,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872412891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:56,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:24:56,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2022-11-25 17:24:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177080509] [2022-11-25 17:24:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:24:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:24:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:24:56,057 INFO L87 Difference]: Start difference. First operand 2503 states and 3247 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:24:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:56,573 INFO L93 Difference]: Finished difference Result 2911 states and 3718 transitions. [2022-11-25 17:24:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:24:56,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-11-25 17:24:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:56,581 INFO L225 Difference]: With dead ends: 2911 [2022-11-25 17:24:56,582 INFO L226 Difference]: Without dead ends: 2911 [2022-11-25 17:24:56,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:24:56,583 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 439 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:56,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 475 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:24:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2022-11-25 17:24:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2501. [2022-11-25 17:24:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2319 states have (on average 1.2923673997412677) internal successors, (2997), 2375 states have internal predecessors, (2997), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 17:24:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3229 transitions. [2022-11-25 17:24:56,631 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3229 transitions. Word has length 53 [2022-11-25 17:24:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:56,631 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 3229 transitions. [2022-11-25 17:24:56,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:24:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3229 transitions. [2022-11-25 17:24:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:24:56,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:56,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:56,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:56,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:56,839 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:24:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489697, now seen corresponding path program 1 times [2022-11-25 17:24:56,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:56,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239376967] [2022-11-25 17:24:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:24:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:57,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:24:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:58,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:58,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239376967] [2022-11-25 17:24:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239376967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958416778] [2022-11-25 17:24:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:58,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:58,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:58,008 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:58,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:24:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:58,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-25 17:24:58,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:58,505 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 17:24:58,506 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 17:24:58,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:58,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:58,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:58,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:58,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:58,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:24:59,112 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:24:59,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:24:59,136 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:24:59,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:24:59,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:24:59,335 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2022-11-25 17:24:59,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:59,634 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 33 treesize of output 28 [2022-11-25 17:25:00,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:25:00,020 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 27 treesize of output 13 [2022-11-25 17:25:00,098 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 17:25:00,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 17:25:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:00,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958416778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:00,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:00,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2022-11-25 17:25:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125723404] [2022-11-25 17:25:00,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:00,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:25:00,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:25:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:25:00,458 INFO L87 Difference]: Start difference. First operand 2501 states and 3229 transitions. Second operand has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 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 17:25:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:25:05,377 INFO L93 Difference]: Finished difference Result 4064 states and 5287 transitions. [2022-11-25 17:25:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:25:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 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 53 [2022-11-25 17:25:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:25:05,386 INFO L225 Difference]: With dead ends: 4064 [2022-11-25 17:25:05,386 INFO L226 Difference]: Without dead ends: 4064 [2022-11-25 17:25:05,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=979, Invalid=5183, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 17:25:05,388 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2225 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2229 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:25:05,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2229 Valid, 3800 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 17:25:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2022-11-25 17:25:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2637. [2022-11-25 17:25:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2445 states have (on average 1.2834355828220858) internal successors, (3138), 2505 states have internal predecessors, (3138), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 87 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-25 17:25:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3386 transitions. [2022-11-25 17:25:05,450 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3386 transitions. Word has length 53 [2022-11-25 17:25:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:25:05,450 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3386 transitions. [2022-11-25 17:25:05,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 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 17:25:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3386 transitions. [2022-11-25 17:25:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:25:05,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:25:05,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:05,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-25 17:25:05,659 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:25:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489696, now seen corresponding path program 1 times [2022-11-25 17:25:05,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:05,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101073489] [2022-11-25 17:25:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:05,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:07,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:25:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:07,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:25:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101073489] [2022-11-25 17:25:07,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101073489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579148520] [2022-11-25 17:25:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:07,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:07,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:07,719 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:07,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:25:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 17:25:07,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:08,266 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 17:25:08,266 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 17:25:08,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:25:08,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:25:08,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:25:08,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:25:08,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:25:08,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:25:08,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:25:09,039 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:25:09,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:25:09,060 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 17:25:09,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:25:09,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:25:09,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:09,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2022-11-25 17:25:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:09,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:25:10,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:25:10,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 17:25:10,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:25:10,237 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 44 treesize of output 22 [2022-11-25 17:25:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:10,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:25:10,334 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 17:25:10,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:25:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:10,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:17,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579148520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:17,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:17,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 36 [2022-11-25 17:25:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408288443] [2022-11-25 17:25:17,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:17,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:25:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:25:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:25:17,261 INFO L87 Difference]: Start difference. First operand 2637 states and 3386 transitions. Second operand has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 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 17:25:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:25:29,445 INFO L93 Difference]: Finished difference Result 5255 states and 6918 transitions. [2022-11-25 17:25:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 17:25:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 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 53 [2022-11-25 17:25:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:25:29,455 INFO L225 Difference]: With dead ends: 5255 [2022-11-25 17:25:29,455 INFO L226 Difference]: Without dead ends: 5255 [2022-11-25 17:25:29,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1564, Invalid=8536, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 17:25:29,458 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 3421 mSDsluCounter, 4917 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:25:29,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 5196 Invalid, 4837 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [206 Valid, 4631 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 17:25:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2022-11-25 17:25:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 2685. [2022-11-25 17:25:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2493 states have (on average 1.2691536301644606) internal successors, (3164), 2549 states have internal predecessors, (3164), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 91 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-25 17:25:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3412 transitions. [2022-11-25 17:25:29,530 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3412 transitions. Word has length 53 [2022-11-25 17:25:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:25:29,530 INFO L495 AbstractCegarLoop]: Abstraction has 2685 states and 3412 transitions. [2022-11-25 17:25:29,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 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 17:25:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3412 transitions. [2022-11-25 17:25:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 17:25:29,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:25:29,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:29,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:29,738 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:25:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2096673869, now seen corresponding path program 1 times [2022-11-25 17:25:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:29,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611341459] [2022-11-25 17:25:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:29,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:29,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 17:25:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:29,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 17:25:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:25:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611341459] [2022-11-25 17:25:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611341459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877959266] [2022-11-25 17:25:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:29,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:29,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:29,922 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:29,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:25:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:25:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:30,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:25:30,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:25:30,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:25:30,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:25:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:25:30,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877959266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:30,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:25:30,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-11-25 17:25:30,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833150937] [2022-11-25 17:25:30,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:30,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:25:30,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:30,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:25:30,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:25:30,421 INFO L87 Difference]: Start difference. First operand 2685 states and 3412 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:25:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:25:30,897 INFO L93 Difference]: Finished difference Result 2540 states and 3177 transitions. [2022-11-25 17:25:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:25:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-11-25 17:25:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:25:30,902 INFO L225 Difference]: With dead ends: 2540 [2022-11-25 17:25:30,903 INFO L226 Difference]: Without dead ends: 2540 [2022-11-25 17:25:30,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:25:30,903 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 222 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:25:30,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1017 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:25:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-25 17:25:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2130. [2022-11-25 17:25:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1978 states have (on average 1.2553083923154702) internal successors, (2483), 2024 states have internal predecessors, (2483), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 76 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-25 17:25:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2681 transitions. [2022-11-25 17:25:30,946 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2681 transitions. Word has length 54 [2022-11-25 17:25:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:25:30,946 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2681 transitions. [2022-11-25 17:25:30,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:25:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2681 transitions. [2022-11-25 17:25:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:25:30,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:25:30,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:30,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:31,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:31,154 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:25:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:31,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2010110243, now seen corresponding path program 1 times [2022-11-25 17:25:31,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:31,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536068402] [2022-11-25 17:25:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:31,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:31,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:25:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536068402] [2022-11-25 17:25:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536068402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404872695] [2022-11-25 17:25:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:31,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:31,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:25:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:25:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:31,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:31,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404872695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:31,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:31,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-25 17:25:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038115134] [2022-11-25 17:25:31,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:25:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:25:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:25:31,651 INFO L87 Difference]: Start difference. First operand 2130 states and 2681 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 17:25:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:25:31,710 INFO L93 Difference]: Finished difference Result 4141 states and 5286 transitions. [2022-11-25 17:25:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:25:31,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) Word has length 55 [2022-11-25 17:25:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:25:31,718 INFO L225 Difference]: With dead ends: 4141 [2022-11-25 17:25:31,718 INFO L226 Difference]: Without dead ends: 4141 [2022-11-25 17:25:31,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:25:31,719 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 270 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:25:31,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 596 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:25:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2022-11-25 17:25:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3226. [2022-11-25 17:25:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3026 states have (on average 1.2785855915399869) internal successors, (3869), 3078 states have internal predecessors, (3869), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-25 17:25:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4163 transitions. [2022-11-25 17:25:31,799 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4163 transitions. Word has length 55 [2022-11-25 17:25:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:25:31,799 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 4163 transitions. [2022-11-25 17:25:31,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 17:25:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4163 transitions. [2022-11-25 17:25:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 17:25:31,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:25:31,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:31,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:32,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-25 17:25:32,018 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:25:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2111090623, now seen corresponding path program 1 times [2022-11-25 17:25:32,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:32,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939377834] [2022-11-25 17:25:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:33,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:25:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:33,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939377834] [2022-11-25 17:25:33,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939377834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484491801] [2022-11-25 17:25:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:33,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:33,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:33,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:33,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:25:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:25:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:34,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:25:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:34,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-25 17:25:34,556 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 33 treesize of output 15 [2022-11-25 17:25:34,595 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 13 treesize of output 9 [2022-11-25 17:25:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:34,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:34,768 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1324 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1324)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-25 17:25:34,855 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 150 treesize of output 142 [2022-11-25 17:27:39,509 WARN L233 SmtUtils]: Spent 2.07m on a formula simplification. DAG size of input: 71 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:28:23,757 WARN L233 SmtUtils]: Spent 40.11s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:29:10,025 WARN L233 SmtUtils]: Spent 40.10s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:00,320 WARN L233 SmtUtils]: Spent 42.10s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:25,036 WARN L233 SmtUtils]: Spent 24.09s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:33,300 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:35,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484491801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:35,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:30:35,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-11-25 17:30:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080702217] [2022-11-25 17:30:35,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:35,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:30:35,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:30:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1384, Unknown=11, NotChecked=76, Total=1640 [2022-11-25 17:30:35,436 INFO L87 Difference]: Start difference. First operand 3226 states and 4163 transitions. Second operand has 30 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 29 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:30:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:30:38,265 INFO L93 Difference]: Finished difference Result 3366 states and 4350 transitions. [2022-11-25 17:30:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:30:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 29 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-11-25 17:30:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:30:38,271 INFO L225 Difference]: With dead ends: 3366 [2022-11-25 17:30:38,271 INFO L226 Difference]: Without dead ends: 3355 [2022-11-25 17:30:38,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 301.9s TimeCoverageRelationStatistics Valid=411, Invalid=2032, Unknown=11, NotChecked=96, Total=2550 [2022-11-25 17:30:38,273 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1230 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:30:38,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 1387 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 17:30:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2022-11-25 17:30:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 3229. [2022-11-25 17:30:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3029 states have (on average 1.2783096731594585) internal successors, (3872), 3081 states have internal predecessors, (3872), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-25 17:30:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 4166 transitions. [2022-11-25 17:30:38,333 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 4166 transitions. Word has length 56 [2022-11-25 17:30:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:30:38,333 INFO L495 AbstractCegarLoop]: Abstraction has 3229 states and 4166 transitions. [2022-11-25 17:30:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 29 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:30:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 4166 transitions. [2022-11-25 17:30:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 17:30:38,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:30:38,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:38,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:38,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-25 17:30:38,542 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:30:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1925711235, now seen corresponding path program 1 times [2022-11-25 17:30:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:38,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146547677] [2022-11-25 17:30:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:38,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:39,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:30:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146547677] [2022-11-25 17:30:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146547677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404908063] [2022-11-25 17:30:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:39,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:39,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:39,195 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:39,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:30:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:30:39,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:40,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:30:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:30:40,514 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 39 treesize of output 15 [2022-11-25 17:30:40,559 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 13 treesize of output 9 [2022-11-25 17:30:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:40,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:40,722 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 46 treesize of output 38 [2022-11-25 17:30:48,887 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 30 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:31:03,299 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:31:13,958 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:31:13,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404908063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:13,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:13,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-25 17:31:13,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924403271] [2022-11-25 17:31:13,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:13,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:31:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:31:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 17:31:13,993 INFO L87 Difference]: Start difference. First operand 3229 states and 4166 transitions. Second operand has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:31:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:31:16,790 INFO L93 Difference]: Finished difference Result 3358 states and 4341 transitions. [2022-11-25 17:31:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:31:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-11-25 17:31:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:31:16,796 INFO L225 Difference]: With dead ends: 3358 [2022-11-25 17:31:16,797 INFO L226 Difference]: Without dead ends: 3344 [2022-11-25 17:31:16,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 17:31:16,798 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 976 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:31:16,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1550 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 17:31:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-11-25 17:31:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3223. [2022-11-25 17:31:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3023 states have (on average 1.2778696658948066) internal successors, (3863), 3075 states have internal predecessors, (3863), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-25 17:31:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4157 transitions. [2022-11-25 17:31:16,858 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4157 transitions. Word has length 56 [2022-11-25 17:31:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:31:16,858 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4157 transitions. [2022-11-25 17:31:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:31:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4157 transitions. [2022-11-25 17:31:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 17:31:16,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:31:16,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:16,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:17,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-25 17:31:17,067 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:31:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1410137754, now seen corresponding path program 1 times [2022-11-25 17:31:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:17,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209168854] [2022-11-25 17:31:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:31:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:31:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:31:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209168854] [2022-11-25 17:31:18,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209168854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:18,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:18,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 17:31:18,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035754516] [2022-11-25 17:31:18,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:18,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:31:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:31:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:31:18,216 INFO L87 Difference]: Start difference. First operand 3223 states and 4157 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 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 17:31:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:31:19,942 INFO L93 Difference]: Finished difference Result 4234 states and 5461 transitions. [2022-11-25 17:31:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:31:19,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 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 57 [2022-11-25 17:31:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:31:19,947 INFO L225 Difference]: With dead ends: 4234 [2022-11-25 17:31:19,947 INFO L226 Difference]: Without dead ends: 4234 [2022-11-25 17:31:19,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:31:19,947 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 1150 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:31:19,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 1243 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:31:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2022-11-25 17:31:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 3792. [2022-11-25 17:31:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3560 states have (on average 1.2797752808988765) internal successors, (4556), 3619 states have internal predecessors, (4556), 174 states have call successors, (174), 34 states have call predecessors, (174), 34 states have return successors, (174), 138 states have call predecessors, (174), 174 states have call successors, (174) [2022-11-25 17:31:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 4904 transitions. [2022-11-25 17:31:20,010 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 4904 transitions. Word has length 57 [2022-11-25 17:31:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:31:20,011 INFO L495 AbstractCegarLoop]: Abstraction has 3792 states and 4904 transitions. [2022-11-25 17:31:20,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 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 17:31:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 4904 transitions. [2022-11-25 17:31:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 17:31:20,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:31:20,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-25 17:31:20,013 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:31:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash 765305624, now seen corresponding path program 1 times [2022-11-25 17:31:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711517394] [2022-11-25 17:31:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:22,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:31:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:31:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:22,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:22,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711517394] [2022-11-25 17:31:22,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711517394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:22,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312524330] [2022-11-25 17:31:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:22,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:22,885 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:22,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:31:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 17:31:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:23,500 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 17:31:23,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 17:31:23,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:23,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:23,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:23,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:23,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:23,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:24,443 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:31:24,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:31:24,468 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 17:31:24,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:31:24,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:31:24,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:31:24,697 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 124 [2022-11-25 17:31:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:25,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:31:25,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 35 [2022-11-25 17:31:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:31:26,095 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 35 treesize of output 17 [2022-11-25 17:31:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:26,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:33,309 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse3 (+ |c_~#list~0.offset| .cse8)) (.cse4 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse8)) (.cse2 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1498 (Array Int Int)) (v_ArrVal_1503 Int) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1498))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (= (select |c_#valid| (select (select (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse2 v_ArrVal_1503)) |c_~#list~0.base|) .cse3)) 1) (= (select .cse1 .cse4) 0) (not (= 0 (select .cse1 .cse2))))))) (forall ((v_ArrVal_1498 (Array Int Int)) (v_ArrVal_1497 (Array Int Int)) (v_ArrVal_1503 Int) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1498)) (.cse7 (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|))) (let ((.cse6 (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) .cse7 |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (= (select |c_#valid| (select (select (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse6 .cse2 v_ArrVal_1503)) |c_~#list~0.base|) .cse3)) 1) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1497) |c_ULTIMATE.start_append_one_~list#1.base|) .cse7 |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse4) 0) (not (= 0 (select .cse6 .cse2)))))))))) is different from false [2022-11-25 17:31:34,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312524330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:34,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:34,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 38 [2022-11-25 17:31:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977328607] [2022-11-25 17:31:34,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:31:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:31:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2743, Unknown=3, NotChecked=106, Total=3080 [2022-11-25 17:31:34,410 INFO L87 Difference]: Start difference. First operand 3792 states and 4904 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 36 states have internal predecessors, (108), 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 17:31:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:31:49,375 INFO L93 Difference]: Finished difference Result 6678 states and 8542 transitions. [2022-11-25 17:31:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-25 17:31:49,376 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 36 states have internal predecessors, (108), 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 58 [2022-11-25 17:31:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:31:49,383 INFO L225 Difference]: With dead ends: 6678 [2022-11-25 17:31:49,383 INFO L226 Difference]: Without dead ends: 6678 [2022-11-25 17:31:49,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1709, Invalid=12334, Unknown=3, NotChecked=234, Total=14280 [2022-11-25 17:31:49,386 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 2125 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 2671 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 3510 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 2671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:31:49,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2125 Valid, 3510 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 2671 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 17:31:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2022-11-25 17:31:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 5635. [2022-11-25 17:31:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 5296 states have (on average 1.2688821752265862) internal successors, (6720), 5376 states have internal predecessors, (6720), 266 states have call successors, (266), 49 states have call predecessors, (266), 49 states have return successors, (266), 209 states have call predecessors, (266), 266 states have call successors, (266) [2022-11-25 17:31:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 7252 transitions. [2022-11-25 17:31:49,483 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 7252 transitions. Word has length 58 [2022-11-25 17:31:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:31:49,483 INFO L495 AbstractCegarLoop]: Abstraction has 5635 states and 7252 transitions. [2022-11-25 17:31:49,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 36 states have internal predecessors, (108), 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 17:31:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 7252 transitions. [2022-11-25 17:31:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 17:31:49,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:31:49,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:49,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:49,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-11-25 17:31:49,691 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:31:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 764597623, now seen corresponding path program 1 times [2022-11-25 17:31:49,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:49,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775581127] [2022-11-25 17:31:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:50,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:31:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:50,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:31:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:50,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:50,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775581127] [2022-11-25 17:31:50,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775581127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:50,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569083094] [2022-11-25 17:31:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:50,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:50,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:50,842 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:50,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:31:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 17:31:51,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:51,327 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:31:51,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 17:31:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:51,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:51,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:31:51,953 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:31:51,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:31:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:31:53,072 INFO L321 Elim1Store]: treesize reduction 30, result has 51.6 percent of original size [2022-11-25 17:31:53,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 98 [2022-11-25 17:31:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-25 17:31:54,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:31:54,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:31:54,574 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 65 [2022-11-25 17:31:54,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-25 17:31:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:54,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:55,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:31:55,721 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-25 17:31:55,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2022-11-25 17:31:58,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569083094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:58,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:58,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2022-11-25 17:31:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049913600] [2022-11-25 17:31:58,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:31:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:31:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1869, Unknown=13, NotChecked=0, Total=2070 [2022-11-25 17:31:58,833 INFO L87 Difference]: Start difference. First operand 5635 states and 7252 transitions. Second operand has 31 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 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 17:32:00,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:32:14,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:32:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:32:14,683 INFO L93 Difference]: Finished difference Result 6527 states and 8294 transitions. [2022-11-25 17:32:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 17:32:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 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 58 [2022-11-25 17:32:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:32:14,693 INFO L225 Difference]: With dead ends: 6527 [2022-11-25 17:32:14,693 INFO L226 Difference]: Without dead ends: 6527 [2022-11-25 17:32:14,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1270, Invalid=8223, Unknown=13, NotChecked=0, Total=9506 [2022-11-25 17:32:14,696 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1186 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 3757 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:32:14,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 3757 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2486 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-25 17:32:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2022-11-25 17:32:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 5754. [2022-11-25 17:32:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5754 states, 5412 states have (on average 1.270509977827051) internal successors, (6876), 5493 states have internal predecessors, (6876), 268 states have call successors, (268), 50 states have call predecessors, (268), 50 states have return successors, (268), 210 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-25 17:32:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 7412 transitions. [2022-11-25 17:32:14,784 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 7412 transitions. Word has length 58 [2022-11-25 17:32:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:32:14,784 INFO L495 AbstractCegarLoop]: Abstraction has 5754 states and 7412 transitions. [2022-11-25 17:32:14,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 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 17:32:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 7412 transitions. [2022-11-25 17:32:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 17:32:14,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:32:14,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:14,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:14,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:14,992 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:32:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2067277252, now seen corresponding path program 1 times [2022-11-25 17:32:14,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:14,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85912938] [2022-11-25 17:32:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:32:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:32:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:16,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:16,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85912938] [2022-11-25 17:32:16,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85912938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:16,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074751537] [2022-11-25 17:32:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:16,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:16,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:16,110 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:16,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:32:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-25 17:32:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:16,562 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 17:32:16,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 17:32:16,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:32:16,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:32:16,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:32:17,149 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:32:17,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:32:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:18,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:18,190 INFO L321 Elim1Store]: treesize reduction 30, result has 51.6 percent of original size [2022-11-25 17:32:18,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 102 [2022-11-25 17:32:18,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:18,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-25 17:32:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:19,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:19,621 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 69 [2022-11-25 17:32:19,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-25 17:32:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:19,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,640 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-25 17:32:20,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2022-11-25 17:32:23,830 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse2 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse4 (+ |c_~#list~0.offset| .cse5))) (let ((.cse0 (forall ((v_ArrVal_1649 Int) (v_ArrVal_1645 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1645))) (let ((.cse6 (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (not (= (select .cse6 .cse2) 0)) (= 1 (select |c_#valid| (select (select (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse6 .cse2 v_ArrVal_1649)) |c_~#list~0.base|) .cse4))))))))) (and (or (= |c_~#list~0.offset| |c_ULTIMATE.start_append_one_~list#1.offset|) .cse0) (forall ((v_ArrVal_1649 Int) (v_ArrVal_1645 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1645))) (let ((.cse1 (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (not (= (select .cse1 .cse2) 0)) (= 1 (select |c_#valid| (select (select (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse2 v_ArrVal_1649)) |c_~#list~0.base|) .cse4))) (= (select .cse1 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse5)) 0))))) (or (= |c_~#list~0.base| |c_ULTIMATE.start_append_one_~list#1.base|) .cse0))))) is different from false [2022-11-25 17:32:24,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074751537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:24,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:24,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2022-11-25 17:32:24,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004869786] [2022-11-25 17:32:24,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:24,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:32:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:32:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1842, Unknown=2, NotChecked=88, Total=2162 [2022-11-25 17:32:24,671 INFO L87 Difference]: Start difference. First operand 5754 states and 7412 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 17:32:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:32:34,406 INFO L93 Difference]: Finished difference Result 6742 states and 8629 transitions. [2022-11-25 17:32:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:32:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 59 [2022-11-25 17:32:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:32:34,416 INFO L225 Difference]: With dead ends: 6742 [2022-11-25 17:32:34,416 INFO L226 Difference]: Without dead ends: 6742 [2022-11-25 17:32:34,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1266, Invalid=7292, Unknown=2, NotChecked=182, Total=8742 [2022-11-25 17:32:34,417 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1324 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:32:34,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 3082 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 17:32:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2022-11-25 17:32:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 5865. [2022-11-25 17:32:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5523 states have (on average 1.2714104653268152) internal successors, (7022), 5604 states have internal predecessors, (7022), 268 states have call successors, (268), 50 states have call predecessors, (268), 50 states have return successors, (268), 210 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-25 17:32:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 7558 transitions. [2022-11-25 17:32:34,529 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 7558 transitions. Word has length 59 [2022-11-25 17:32:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:32:34,530 INFO L495 AbstractCegarLoop]: Abstraction has 5865 states and 7558 transitions. [2022-11-25 17:32:34,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 17:32:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 7558 transitions. [2022-11-25 17:32:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 17:32:34,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:32:34,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:34,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:34,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:34,738 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:32:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash 338914841, now seen corresponding path program 1 times [2022-11-25 17:32:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:34,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681666622] [2022-11-25 17:32:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:34,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:32:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:32:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:36,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681666622] [2022-11-25 17:32:36,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681666622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147049683] [2022-11-25 17:32:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:36,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:36,521 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:36,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:32:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:36,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 17:32:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:36,982 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:32:36,982 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 17:32:37,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:32:37,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:32:37,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:32:37,403 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:32:37,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:32:37,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:37,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-25 17:32:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:38,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 43 [2022-11-25 17:32:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:38,576 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 37 treesize of output 23 [2022-11-25 17:32:38,582 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 25 treesize of output 13 [2022-11-25 17:32:38,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:32:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:38,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:39,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:39,825 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-25 17:32:39,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2022-11-25 17:32:39,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:39,964 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 44 treesize of output 48 [2022-11-25 17:32:41,077 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse0 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse4 (+ |c_~#list~0.offset| .cse2))) (and (or (forall ((v_ArrVal_1720 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1720) |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse0) 0))) (= |c_~#list~0.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (forall ((v_ArrVal_1720 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int) (v_ArrVal_1724 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1720))) (let ((.cse1 (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (not (= (select .cse1 .cse0) 0)) (= 0 (select .cse1 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse2))) (not (= (select (select (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse0 v_ArrVal_1724)) |c_~#list~0.base|) .cse4) |c_~#list~0.base|)))))) (or (forall ((v_ArrVal_1720 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int) (v_ArrVal_1724 Int)) (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1720))) (let ((.cse5 (store (select .cse6 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (not (= (select .cse5 .cse0) 0)) (not (= (select (select (store .cse6 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse5 .cse0 v_ArrVal_1724)) |c_~#list~0.base|) .cse4) |c_~#list~0.base|)))))) (= |c_~#list~0.offset| |c_ULTIMATE.start_append_one_~list#1.offset|))))) is different from false [2022-11-25 17:32:41,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147049683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:41,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:41,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 35 [2022-11-25 17:32:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482476357] [2022-11-25 17:32:41,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:41,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:32:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:32:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2257, Unknown=3, NotChecked=96, Total=2550 [2022-11-25 17:32:41,879 INFO L87 Difference]: Start difference. First operand 5865 states and 7558 transitions. Second operand has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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 17:33:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:33:12,760 INFO L93 Difference]: Finished difference Result 9957 states and 12806 transitions. [2022-11-25 17:33:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-25 17:33:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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 60 [2022-11-25 17:33:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:33:12,773 INFO L225 Difference]: With dead ends: 9957 [2022-11-25 17:33:12,773 INFO L226 Difference]: Without dead ends: 9957 [2022-11-25 17:33:12,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10599 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=5322, Invalid=28719, Unknown=3, NotChecked=366, Total=34410 [2022-11-25 17:33:12,777 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 3379 mSDsluCounter, 5335 mSDsCounter, 0 mSdLazyCounter, 5839 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3379 SdHoareTripleChecker+Valid, 5602 SdHoareTripleChecker+Invalid, 6290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 5839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:33:12,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3379 Valid, 5602 Invalid, 6290 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [451 Valid, 5839 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-25 17:33:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2022-11-25 17:33:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 6942. [2022-11-25 17:33:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6942 states, 6551 states have (on average 1.269119218439933) internal successors, (8314), 6640 states have internal predecessors, (8314), 310 states have call successors, (310), 57 states have call predecessors, (310), 57 states have return successors, (310), 244 states have call predecessors, (310), 310 states have call successors, (310) [2022-11-25 17:33:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6942 states to 6942 states and 8934 transitions. [2022-11-25 17:33:12,902 INFO L78 Accepts]: Start accepts. Automaton has 6942 states and 8934 transitions. Word has length 60 [2022-11-25 17:33:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:33:12,903 INFO L495 AbstractCegarLoop]: Abstraction has 6942 states and 8934 transitions. [2022-11-25 17:33:12,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 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 17:33:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6942 states and 8934 transitions. [2022-11-25 17:33:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:33:12,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:33:12,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:12,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:13,111 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:33:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash 246931767, now seen corresponding path program 1 times [2022-11-25 17:33:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:13,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154448771] [2022-11-25 17:33:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:14,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-25 17:33:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:14,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 17:33:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:33:14,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:14,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154448771] [2022-11-25 17:33:14,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154448771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:14,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647061587] [2022-11-25 17:33:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:14,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:14,983 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:14,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:33:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-25 17:33:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:15,845 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:33:15,845 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 17:33:16,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:16,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:16,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:16,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:16,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:16,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:16,581 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:33:16,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-25 17:33:16,605 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-25 17:33:16,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:33:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:17,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:33:17,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:33:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:17,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2022-11-25 17:33:17,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:17,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-25 17:33:17,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:17,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:17,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:17,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:17,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-11-25 17:33:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:33:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647061587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:40,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:40,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2022-11-25 17:33:40,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137704347] [2022-11-25 17:33:40,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:40,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 17:33:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 17:33:40,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2880, Unknown=8, NotChecked=0, Total=3080 [2022-11-25 17:33:40,917 INFO L87 Difference]: Start difference. First operand 6942 states and 8934 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 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 17:33:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:33:54,644 INFO L93 Difference]: Finished difference Result 11085 states and 14576 transitions. [2022-11-25 17:33:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:33:54,645 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 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 61 [2022-11-25 17:33:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:33:54,657 INFO L225 Difference]: With dead ends: 11085 [2022-11-25 17:33:54,657 INFO L226 Difference]: Without dead ends: 11061 [2022-11-25 17:33:54,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=1346, Invalid=10202, Unknown=8, NotChecked=0, Total=11556 [2022-11-25 17:33:54,658 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1940 mSDsluCounter, 3671 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:33:54,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1942 Valid, 3823 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2599 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-25 17:33:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11061 states. [2022-11-25 17:33:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11061 to 7458. [2022-11-25 17:33:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7023 states have (on average 1.2647016944325786) internal successors, (8882), 7112 states have internal predecessors, (8882), 344 states have call successors, (344), 67 states have call predecessors, (344), 67 states have return successors, (344), 278 states have call predecessors, (344), 344 states have call successors, (344) [2022-11-25 17:33:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 9570 transitions. [2022-11-25 17:33:54,841 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 9570 transitions. Word has length 61 [2022-11-25 17:33:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:33:54,842 INFO L495 AbstractCegarLoop]: Abstraction has 7458 states and 9570 transitions. [2022-11-25 17:33:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 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 17:33:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 9570 transitions. [2022-11-25 17:33:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:33:54,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:33:54,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:54,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:55,049 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:33:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1868138295, now seen corresponding path program 2 times [2022-11-25 17:33:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:55,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150300695] [2022-11-25 17:33:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:56,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:33:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:56,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 17:33:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:33:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150300695] [2022-11-25 17:33:56,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150300695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291918352] [2022-11-25 17:33:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:33:56,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:56,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:56,892 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:56,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:33:57,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:33:57,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 17:33:57,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:57,441 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:33:57,441 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 17:33:57,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:57,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:57,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:57,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:57,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:57,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:33:57,978 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:33:57,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-25 17:33:57,999 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-25 17:33:57,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:33:58,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:33:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:58,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 25 [2022-11-25 17:33:58,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:58,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:33:59,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:59,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-25 17:33:59,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:59,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:33:59,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:59,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 60 [2022-11-25 17:33:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:59,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:11,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291918352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:11,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:34:11,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2022-11-25 17:34:11,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047890756] [2022-11-25 17:34:11,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:11,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:34:11,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:34:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2992, Unknown=2, NotChecked=0, Total=3192 [2022-11-25 17:34:11,266 INFO L87 Difference]: Start difference. First operand 7458 states and 9570 transitions. Second operand has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 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 17:34:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:34:26,570 INFO L93 Difference]: Finished difference Result 7778 states and 9850 transitions. [2022-11-25 17:34:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 17:34:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 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 61 [2022-11-25 17:34:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:34:26,579 INFO L225 Difference]: With dead ends: 7778 [2022-11-25 17:34:26,579 INFO L226 Difference]: Without dead ends: 7760 [2022-11-25 17:34:26,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3657 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1809, Invalid=12709, Unknown=2, NotChecked=0, Total=14520 [2022-11-25 17:34:26,580 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1774 mSDsluCounter, 4306 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 4528 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:34:26,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1775 Valid, 4528 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 17:34:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7760 states. [2022-11-25 17:34:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7760 to 6443. [2022-11-25 17:34:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6443 states, 6064 states have (on average 1.253627968337731) internal successors, (7602), 6141 states have internal predecessors, (7602), 299 states have call successors, (299), 56 states have call predecessors, (299), 56 states have return successors, (299), 245 states have call predecessors, (299), 299 states have call successors, (299) [2022-11-25 17:34:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6443 states to 6443 states and 8200 transitions. [2022-11-25 17:34:26,681 INFO L78 Accepts]: Start accepts. Automaton has 6443 states and 8200 transitions. Word has length 61 [2022-11-25 17:34:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:34:26,681 INFO L495 AbstractCegarLoop]: Abstraction has 6443 states and 8200 transitions. [2022-11-25 17:34:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 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 17:34:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6443 states and 8200 transitions. [2022-11-25 17:34:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:34:26,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:34:26,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:26,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:26,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:26,889 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:34:26,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1916425694, now seen corresponding path program 1 times [2022-11-25 17:34:26,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:26,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193635581] [2022-11-25 17:34:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:26,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:27,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:34:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:27,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:34:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:34:27,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193635581] [2022-11-25 17:34:27,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193635581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733323686] [2022-11-25 17:34:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:27,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:27,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:27,418 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:27,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:34:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:34:27,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:28,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:28,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733323686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:28,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:34:28,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2022-11-25 17:34:28,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926577187] [2022-11-25 17:34:28,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:28,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:34:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:34:28,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:34:28,284 INFO L87 Difference]: Start difference. First operand 6443 states and 8200 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:34:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:34:29,401 INFO L93 Difference]: Finished difference Result 11112 states and 14213 transitions. [2022-11-25 17:34:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:34:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-11-25 17:34:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:34:29,416 INFO L225 Difference]: With dead ends: 11112 [2022-11-25 17:34:29,417 INFO L226 Difference]: Without dead ends: 11112 [2022-11-25 17:34:29,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:34:29,417 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 963 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:34:29,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 611 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:34:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11112 states. [2022-11-25 17:34:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11112 to 6442. [2022-11-25 17:34:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6064 states have (on average 1.249835092348285) internal successors, (7579), 6140 states have internal predecessors, (7579), 299 states have call successors, (299), 56 states have call predecessors, (299), 56 states have return successors, (299), 245 states have call predecessors, (299), 299 states have call successors, (299) [2022-11-25 17:34:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 8177 transitions. [2022-11-25 17:34:29,536 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 8177 transitions. Word has length 61 [2022-11-25 17:34:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:34:29,537 INFO L495 AbstractCegarLoop]: Abstraction has 6442 states and 8177 transitions. [2022-11-25 17:34:29,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:34:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 8177 transitions. [2022-11-25 17:34:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 17:34:29,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:34:29,539 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, 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 17:34:29,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-25 17:34:29,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-25 17:34:29,744 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:34:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:29,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1407510296, now seen corresponding path program 1 times [2022-11-25 17:34:29,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:29,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767529262] [2022-11-25 17:34:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:29,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:30,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:34:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:30,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:34:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:34:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:30,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767529262] [2022-11-25 17:34:30,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767529262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:30,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:30,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-25 17:34:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138579213] [2022-11-25 17:34:30,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:30,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:34:30,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:34:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:34:30,507 INFO L87 Difference]: Start difference. First operand 6442 states and 8177 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 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 17:34:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:34:31,989 INFO L93 Difference]: Finished difference Result 7296 states and 9094 transitions. [2022-11-25 17:34:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:34:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-11-25 17:34:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:34:31,997 INFO L225 Difference]: With dead ends: 7296 [2022-11-25 17:34:31,997 INFO L226 Difference]: Without dead ends: 7296 [2022-11-25 17:34:31,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=893, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:34:31,998 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 998 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:34:31,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 1509 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:34:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7296 states. [2022-11-25 17:34:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7296 to 5215. [2022-11-25 17:34:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5215 states, 4891 states have (on average 1.2533224289511347) internal successors, (6130), 4976 states have internal predecessors, (6130), 245 states have call successors, (245), 56 states have call predecessors, (245), 56 states have return successors, (245), 182 states have call predecessors, (245), 245 states have call successors, (245) [2022-11-25 17:34:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 6620 transitions. [2022-11-25 17:34:32,074 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 6620 transitions. Word has length 68 [2022-11-25 17:34:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:34:32,074 INFO L495 AbstractCegarLoop]: Abstraction has 5215 states and 6620 transitions. [2022-11-25 17:34:32,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 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 17:34:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 6620 transitions. [2022-11-25 17:34:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 17:34:32,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:34:32,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:32,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-25 17:34:32,077 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:34:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -742029570, now seen corresponding path program 1 times [2022-11-25 17:34:32,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:32,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535818457] [2022-11-25 17:34:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:34,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:34:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:34:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:34:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535818457] [2022-11-25 17:34:34,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535818457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009139967] [2022-11-25 17:34:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:34,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:34,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:34,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:34:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-25 17:34:34,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:35,000 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:34:35,000 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 17:34:35,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:34:35,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:34:35,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:34:35,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:34:35,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:34:35,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:34:35,602 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:34:35,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:34:35,622 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 17:34:35,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:34:35,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:34:35,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:34:35,844 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 59 [2022-11-25 17:34:36,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:34:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:36,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2022-11-25 17:34:36,890 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:34:36,891 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 17:34:37,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-25 17:34:37,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-25 17:34:37,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-25 17:34:37,760 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 17:34:37,761 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 67 treesize of output 62 [2022-11-25 17:34:37,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:37,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:34:37,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 35 [2022-11-25 17:34:38,367 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 41 treesize of output 17 [2022-11-25 17:34:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:38,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:38,736 INFO L321 Elim1Store]: treesize reduction 5, result has 85.3 percent of original size [2022-11-25 17:34:38,736 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 38 treesize of output 37 [2022-11-25 17:34:38,743 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2125 (Array Int Int)) (v_ArrVal_2127 Int)) (= |c_ULTIMATE.start_create_item_~link#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2125))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2127))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))))) is different from false [2022-11-25 17:34:38,951 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2125 (Array Int Int)) (v_ArrVal_2124 (Array Int Int)) (v_ArrVal_2127 Int) (|v_ULTIMATE.start_create_item_~item~0#1.base_30| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_item_~item~0#1.base_30|) 0)) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_item_~item~0#1.base_30| v_ArrVal_2124) |c_ULTIMATE.start_append_one_#t~mem7#1.base| v_ArrVal_2125))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2127))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) |c_ULTIMATE.start_append_one_#t~mem7#1.base|))) is different from false [2022-11-25 17:34:39,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009139967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:39,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:34:39,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 45 [2022-11-25 17:34:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550866368] [2022-11-25 17:34:39,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 17:34:39,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 17:34:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2519, Unknown=16, NotChecked=206, Total=2970 [2022-11-25 17:34:39,258 INFO L87 Difference]: Start difference. First operand 5215 states and 6620 transitions. Second operand has 46 states, 45 states have (on average 3.2) internal successors, (144), 42 states have internal predecessors, (144), 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 17:34:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:34:55,131 INFO L93 Difference]: Finished difference Result 12106 states and 15566 transitions. [2022-11-25 17:34:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-25 17:34:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.2) internal successors, (144), 42 states have internal predecessors, (144), 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 77 [2022-11-25 17:34:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:34:55,142 INFO L225 Difference]: With dead ends: 12106 [2022-11-25 17:34:55,142 INFO L226 Difference]: Without dead ends: 12106 [2022-11-25 17:34:55,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6878 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2671, Invalid=19373, Unknown=16, NotChecked=590, Total=22650 [2022-11-25 17:34:55,143 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 3387 mSDsluCounter, 4502 mSDsCounter, 0 mSdLazyCounter, 3964 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 4704 SdHoareTripleChecker+Invalid, 4290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 3964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:34:55,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 4704 Invalid, 4290 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [326 Valid, 3964 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-25 17:34:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2022-11-25 17:34:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 7559. [2022-11-25 17:34:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7559 states, 7147 states have (on average 1.2303064222750804) internal successors, (8793), 7189 states have internal predecessors, (8793), 322 states have call successors, (322), 67 states have call predecessors, (322), 67 states have return successors, (322), 302 states have call predecessors, (322), 322 states have call successors, (322) [2022-11-25 17:34:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7559 states to 7559 states and 9437 transitions. [2022-11-25 17:34:55,282 INFO L78 Accepts]: Start accepts. Automaton has 7559 states and 9437 transitions. Word has length 77 [2022-11-25 17:34:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:34:55,282 INFO L495 AbstractCegarLoop]: Abstraction has 7559 states and 9437 transitions. [2022-11-25 17:34:55,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.2) internal successors, (144), 42 states have internal predecessors, (144), 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 17:34:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7559 states and 9437 transitions. [2022-11-25 17:34:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 17:34:55,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:34:55,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:55,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:55,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-25 17:34:55,490 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:34:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash -742029569, now seen corresponding path program 1 times [2022-11-25 17:34:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330638347] [2022-11-25 17:34:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:35:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:01,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:35:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:35:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330638347] [2022-11-25 17:35:01,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330638347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601498453] [2022-11-25 17:35:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:01,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:35:01,844 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:35:01,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:35:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:02,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-25 17:35:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:02,495 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 17:35:02,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 17:35:02,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:35:02,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:35:02,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:35:02,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:35:02,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:35:02,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:35:02,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:35:03,565 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:35:03,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:35:03,592 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:35:03,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:35:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:04,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 40 [2022-11-25 17:35:04,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:35:05,688 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-25 17:35:05,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2022-11-25 17:35:05,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:35:06,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-25 17:35:06,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:35:06,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:35:06,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-25 17:35:06,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-25 17:35:06,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:35:06,789 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 17:35:06,789 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 81 treesize of output 74 [2022-11-25 17:35:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:06,797 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 26 treesize of output 28 [2022-11-25 17:35:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:07,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:07,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:35:07,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 35 [2022-11-25 17:35:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:07,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-25 17:35:07,648 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 41 treesize of output 17 [2022-11-25 17:35:07,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:35:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:35:07,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:09,151 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) (.cse3 (* ~unnamed2~0~ITEM_PREV 4))) (and (forall ((v_ArrVal_2280 (Array Int Int)) (v_ArrVal_2282 Int) (v_ArrVal_2279 (Array Int Int)) (v_ArrVal_2278 (Array Int Int)) (v_ArrVal_2277 (Array Int Int)) (v_ArrVal_2281 Int)) (<= (+ (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2277) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2279))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) .cse1 v_ArrVal_2282))) |c_~#list~0.base|) .cse2) .cse3 4) (select |c_#length| (select (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2278) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2280))) (store .cse4 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_append_one_~list#1.base|) .cse1 v_ArrVal_2281))) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_2282 Int) (v_ArrVal_2279 (Array Int Int)) (v_ArrVal_2277 (Array Int Int))) (<= 0 (+ (select (select (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2277) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2279))) (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) .cse1 v_ArrVal_2282))) |c_~#list~0.base|) .cse2) .cse3))))) is different from false [2022-11-25 17:35:14,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601498453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:14,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:35:14,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 52 [2022-11-25 17:35:14,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441552890] [2022-11-25 17:35:14,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:14,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-25 17:35:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-25 17:35:14,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3617, Unknown=20, NotChecked=122, Total=4032 [2022-11-25 17:35:14,662 INFO L87 Difference]: Start difference. First operand 7559 states and 9437 transitions. Second operand has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 49 states have internal predecessors, (144), 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 17:35:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:35:51,198 INFO L93 Difference]: Finished difference Result 15884 states and 20410 transitions. [2022-11-25 17:35:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-25 17:35:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 49 states have internal predecessors, (144), 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 77 [2022-11-25 17:35:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:35:51,218 INFO L225 Difference]: With dead ends: 15884 [2022-11-25 17:35:51,218 INFO L226 Difference]: Without dead ends: 15884 [2022-11-25 17:35:51,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 165 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8518 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=3242, Invalid=24132, Unknown=20, NotChecked=328, Total=27722 [2022-11-25 17:35:51,221 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 5504 mSDsluCounter, 4517 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5507 SdHoareTripleChecker+Valid, 4706 SdHoareTripleChecker+Invalid, 4981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:35:51,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5507 Valid, 4706 Invalid, 4981 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [547 Valid, 4434 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-25 17:35:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15884 states. [2022-11-25 17:35:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15884 to 9278. [2022-11-25 17:35:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9278 states, 8778 states have (on average 1.2294372294372293) internal successors, (10792), 8828 states have internal predecessors, (10792), 397 states have call successors, (397), 80 states have call predecessors, (397), 80 states have return successors, (397), 369 states have call predecessors, (397), 397 states have call successors, (397) [2022-11-25 17:35:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9278 states to 9278 states and 11586 transitions. [2022-11-25 17:35:51,388 INFO L78 Accepts]: Start accepts. Automaton has 9278 states and 11586 transitions. Word has length 77 [2022-11-25 17:35:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:35:51,388 INFO L495 AbstractCegarLoop]: Abstraction has 9278 states and 11586 transitions. [2022-11-25 17:35:51,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 49 states have internal predecessors, (144), 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 17:35:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9278 states and 11586 transitions. [2022-11-25 17:35:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 17:35:51,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:35:51,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:51,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:35:51,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-25 17:35:51,598 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:35:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2047531060, now seen corresponding path program 1 times [2022-11-25 17:35:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:35:51,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236342144] [2022-11-25 17:35:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:35:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:35:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:35:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 17:35:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:35:55,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236342144] [2022-11-25 17:35:55,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236342144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442947901] [2022-11-25 17:35:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:55,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:35:55,222 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:35:55,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:35:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:55,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:35:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:57,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:35:57,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 104 [2022-11-25 17:35:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:57,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:57,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:57,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:35:57,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 76 [2022-11-25 17:35:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 17:35:57,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:59,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:35:59,285 INFO L321 Elim1Store]: treesize reduction 12, result has 82.6 percent of original size [2022-11-25 17:35:59,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 153 [2022-11-25 17:35:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:35:59,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:35:59,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:35:59,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 113 [2022-11-25 17:36:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:36:00,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442947901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:36:00,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:36:00,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 14] total 54 [2022-11-25 17:36:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607081636] [2022-11-25 17:36:00,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 17:36:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 17:36:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2631, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:36:00,680 INFO L87 Difference]: Start difference. First operand 9278 states and 11586 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 52 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:36:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:36:26,462 INFO L93 Difference]: Finished difference Result 9747 states and 12155 transitions. [2022-11-25 17:36:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-25 17:36:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 52 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 79 [2022-11-25 17:36:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:36:26,473 INFO L225 Difference]: With dead ends: 9747 [2022-11-25 17:36:26,473 INFO L226 Difference]: Without dead ends: 9729 [2022-11-25 17:36:26,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=2702, Invalid=15658, Unknown=0, NotChecked=0, Total=18360 [2022-11-25 17:36:26,475 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 3261 mSDsluCounter, 6578 mSDsCounter, 0 mSdLazyCounter, 5559 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 6818 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 5559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:36:26,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3262 Valid, 6818 Invalid, 5886 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [327 Valid, 5559 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-25 17:36:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2022-11-25 17:36:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 7729. [2022-11-25 17:36:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7729 states, 7313 states have (on average 1.2253521126760563) internal successors, (8961), 7359 states have internal predecessors, (8961), 329 states have call successors, (329), 64 states have call predecessors, (329), 64 states have return successors, (329), 305 states have call predecessors, (329), 329 states have call successors, (329) [2022-11-25 17:36:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 9619 transitions. [2022-11-25 17:36:26,603 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 9619 transitions. Word has length 79 [2022-11-25 17:36:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:36:26,604 INFO L495 AbstractCegarLoop]: Abstraction has 7729 states and 9619 transitions. [2022-11-25 17:36:26,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 52 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:36:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 9619 transitions. [2022-11-25 17:36:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:36:26,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:36:26,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:26,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:36:26,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:36:26,815 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:36:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:26,815 INFO L85 PathProgramCache]: Analyzing trace with hash 393975138, now seen corresponding path program 1 times [2022-11-25 17:36:26,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:26,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248266822] [2022-11-25 17:36:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:26,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:29,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:36:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:29,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 17:36:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:36:29,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:29,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248266822] [2022-11-25 17:36:29,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248266822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:36:29,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708357629] [2022-11-25 17:36:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:29,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:36:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:36:29,334 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:36:29,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:36:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-25 17:36:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:29,922 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:36:29,922 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 17:36:30,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:30,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:30,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:30,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:30,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:30,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:30,600 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:36:30,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 17:36:30,619 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 17:36:30,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:36:30,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:36:30,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:36:30,838 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 59 [2022-11-25 17:36:31,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:36:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:31,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2022-11-25 17:36:32,107 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:36:32,108 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 17:36:32,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2022-11-25 17:36:32,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2022-11-25 17:36:32,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2022-11-25 17:36:32,978 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 17:36:32,979 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 53 treesize of output 48 [2022-11-25 17:36:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:36:33,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 33 [2022-11-25 17:36:33,701 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 15 [2022-11-25 17:36:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:33,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:36:34,366 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2556 (Array Int Int)) (v_ArrVal_2555 (Array Int Int)) (v_ArrVal_2558 Int)) (<= (+ (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2555) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2556))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2558))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-25 17:36:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708357629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:36:34,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:36:34,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 45 [2022-11-25 17:36:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844536044] [2022-11-25 17:36:34,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 17:36:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 17:36:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2568, Unknown=14, NotChecked=104, Total=2970 [2022-11-25 17:36:34,835 INFO L87 Difference]: Start difference. First operand 7729 states and 9619 transitions. Second operand has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 42 states have internal predecessors, (150), 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 17:36:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:36:58,681 INFO L93 Difference]: Finished difference Result 12294 states and 15496 transitions. [2022-11-25 17:36:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-25 17:36:58,681 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 42 states have internal predecessors, (150), 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 80 [2022-11-25 17:36:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:36:58,699 INFO L225 Difference]: With dead ends: 12294 [2022-11-25 17:36:58,699 INFO L226 Difference]: Without dead ends: 12294 [2022-11-25 17:36:58,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 167 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=3871, Invalid=24175, Unknown=14, NotChecked=332, Total=28392 [2022-11-25 17:36:58,703 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 3953 mSDsluCounter, 3203 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3953 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:36:58,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3953 Valid, 3338 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-25 17:36:58,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12294 states. [2022-11-25 17:36:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12294 to 8940. [2022-11-25 17:36:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8940 states, 8465 states have (on average 1.2239810986414648) internal successors, (10361), 8511 states have internal predecessors, (10361), 380 states have call successors, (380), 72 states have call predecessors, (380), 72 states have return successors, (380), 356 states have call predecessors, (380), 380 states have call successors, (380) [2022-11-25 17:36:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8940 states to 8940 states and 11121 transitions. [2022-11-25 17:36:58,838 INFO L78 Accepts]: Start accepts. Automaton has 8940 states and 11121 transitions. Word has length 80 [2022-11-25 17:36:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:36:58,839 INFO L495 AbstractCegarLoop]: Abstraction has 8940 states and 11121 transitions. [2022-11-25 17:36:58,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 42 states have internal predecessors, (150), 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 17:36:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8940 states and 11121 transitions. [2022-11-25 17:36:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 17:36:58,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:36:58,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:58,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:36:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-11-25 17:36:59,042 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-25 17:36:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1522460055, now seen corresponding path program 1 times [2022-11-25 17:36:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121283462] [2022-11-25 17:36:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:59,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:36:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:59,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:36:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:36:59,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:59,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121283462] [2022-11-25 17:36:59,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121283462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:36:59,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260372434] [2022-11-25 17:36:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:59,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:36:59,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:36:59,284 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:36:59,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a0d6421-30d7-4c3c-b6c3-7357c0ff97c5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:36:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 17:36:59,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:00,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:37:00,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-11-25 17:37:00,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:37:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:37:00,794 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 18 [2022-11-25 17:37:00,853 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_remove_one_#t~mem14#1.base_27| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_remove_one_#t~mem14#1.base_27| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_remove_one_#t~mem14#1.base_27|) 0))) is different from true [2022-11-25 17:37:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2022-11-25 17:37:00,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:01,438 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 17:37:01,438 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 176 treesize of output 136