./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- 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-b5237d8 [2022-11-22 00:32:55,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:32:55,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:32:55,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:32:55,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:32:55,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:32:55,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:32:55,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:32:55,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:32:56,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:32:56,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:32:56,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:32:56,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:32:56,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:32:56,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:32:56,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:32:56,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:32:56,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:32:56,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:32:56,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:32:56,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:32:56,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:32:56,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:32:56,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:32:56,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:32:56,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:32:56,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:32:56,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:32:56,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:32:56,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:32:56,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:32:56,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:32:56,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:32:56,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:32:56,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:32:56,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:32:56,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:32:56,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:32:56,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:32:56,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:32:56,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:32:56,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 00:32:56,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:32:56,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:32:56,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:32:56,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:32:56,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:32:56,075 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:32:56,075 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:32:56,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:32:56,076 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:32:56,076 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:32:56,077 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:32:56,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:32:56,078 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:32:56,078 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:32:56,078 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:32:56,078 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:32:56,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:32:56,079 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:32:56,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:32:56,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:32:56,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:32:56,080 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:32:56,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:32:56,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:32:56,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:32:56,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:32:56,083 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:32:56,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:32:56,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:32:56,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:32:56,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:32:56,083 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:32:56,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:32:56,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:32:56,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:32:56,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:32:56,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:32:56,092 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:32:56,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:32:56,093 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:32:56,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:32:56,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:32:56,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-11-22 00:32:56,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:32:56,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:32:56,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:32:56,374 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:32:56,374 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:32:56,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/verifythis/duplets.c [2022-11-22 00:32:59,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:32:59,630 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:32:59,631 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/sv-benchmarks/c/verifythis/duplets.c [2022-11-22 00:32:59,639 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/data/2d26c2eba/3994c46904514aefa5d56ef1a4181840/FLAGec0fd6a98 [2022-11-22 00:32:59,655 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/data/2d26c2eba/3994c46904514aefa5d56ef1a4181840 [2022-11-22 00:32:59,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:32:59,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:32:59,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:59,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:32:59,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:32:59,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:59" (1/1) ... [2022-11-22 00:32:59,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1679fa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:59, skipping insertion in model container [2022-11-22 00:32:59,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:59" (1/1) ... [2022-11-22 00:32:59,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:32:59,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:32:59,915 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-22 00:32:59,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:59,979 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:32:59,993 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-22 00:33:00,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:33:00,041 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:33:00,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00 WrapperNode [2022-11-22 00:33:00,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:33:00,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:33:00,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:33:00,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:33:00,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,110 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-11-22 00:33:00,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:33:00,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:33:00,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:33:00,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:33:00,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:33:00,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:33:00,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:33:00,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:33:00,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (1/1) ... [2022-11-22 00:33:00,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:33:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:00,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:33:00,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:33:00,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:33:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:33:00,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:33:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:33:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:33:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:33:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 00:33:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:33:00,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:33:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:33:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 00:33:00,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 00:33:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:33:00,347 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:33:00,349 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:33:00,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:33:00,855 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:33:00,855 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 00:33:00,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:33:00 BoogieIcfgContainer [2022-11-22 00:33:00,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:33:00,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:33:00,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:33:00,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:33:00,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:32:59" (1/3) ... [2022-11-22 00:33:00,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d154f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:33:00, skipping insertion in model container [2022-11-22 00:33:00,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:33:00" (2/3) ... [2022-11-22 00:33:00,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d154f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:33:00, skipping insertion in model container [2022-11-22 00:33:00,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:33:00" (3/3) ... [2022-11-22 00:33:00,874 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-11-22 00:33:00,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:33:00,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-11-22 00:33:00,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:33:00,947 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6afa2760, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:33:00,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-22 00:33:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:33:00,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:00,960 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:00,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551543, now seen corresponding path program 1 times [2022-11-22 00:33:00,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:00,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644046139] [2022-11-22 00:33:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:01,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:01,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644046139] [2022-11-22 00:33:01,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644046139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:01,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:01,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:33:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705829421] [2022-11-22 00:33:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:33:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:33:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:33:01,469 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:01,579 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-11-22 00:33:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:33:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2022-11-22 00:33:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:01,593 INFO L225 Difference]: With dead ends: 85 [2022-11-22 00:33:01,593 INFO L226 Difference]: Without dead ends: 84 [2022-11-22 00:33:01,595 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 [2022-11-22 00:33:01,598 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:01,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-22 00:33:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-22 00:33:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-22 00:33:01,642 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2022-11-22 00:33:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:01,644 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-22 00:33:01,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-22 00:33:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:33:01,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:01,646 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:33:01,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551544, now seen corresponding path program 1 times [2022-11-22 00:33:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149215969] [2022-11-22 00:33:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:33:02,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149215969] [2022-11-22 00:33:02,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149215969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634178460] [2022-11-22 00:33:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:02,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:02,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:02,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:02,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:33:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:33:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:02,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:33:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:33:02,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:33:03,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634178460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:03,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264677884] [2022-11-22 00:33:03,186 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 00:33:03,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:03,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:03,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:03,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:03,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:33:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:33:03,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,459 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:03,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:03,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,573 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:03,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,794 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:03,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:03,932 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:03,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:04,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,124 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:04,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,247 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,472 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:04,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,589 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:04,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:04,684 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:04,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:04,717 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:33:04,733 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:06,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1264677884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:06,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:33:06,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2022-11-22 00:33:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322628780] [2022-11-22 00:33:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:06,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:33:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:33:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:33:06,978 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:07,476 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-11-22 00:33:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:33:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2022-11-22 00:33:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:07,478 INFO L225 Difference]: With dead ends: 83 [2022-11-22 00:33:07,478 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 00:33:07,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:33:07,480 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 87 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:07,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 193 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:33:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 00:33:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-22 00:33:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-22 00:33:07,497 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2022-11-22 00:33:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:07,498 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-22 00:33:07,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-22 00:33:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 00:33:07,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:07,499 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:07,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:33:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-22 00:33:07,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2003392154, now seen corresponding path program 1 times [2022-11-22 00:33:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:07,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129536288] [2022-11-22 00:33:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:33:07,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129536288] [2022-11-22 00:33:07,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129536288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412065813] [2022-11-22 00:33:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:07,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:08,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:33:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:08,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 00:33:08,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:08,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 00:33:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:08,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:33:09,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412065813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173704099] [2022-11-22 00:33:09,270 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 00:33:09,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:09,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:09,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:09,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:33:09,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:33:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,425 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:09,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:09,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,498 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:09,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:09,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,634 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:09,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:09,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,752 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:09,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:09,924 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:09,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:09,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,020 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:10,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:10,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,156 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 36 treesize of output 32 [2022-11-22 00:33:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,268 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:10,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:10,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,338 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:10,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:10,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:10,406 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:10,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:10,434 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:33:10,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [173704099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:13,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:33:13,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 8, 7] total 26 [2022-11-22 00:33:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558978179] [2022-11-22 00:33:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 00:33:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 00:33:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:33:13,067 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:13,834 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-11-22 00:33:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:33:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-11-22 00:33:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:13,837 INFO L225 Difference]: With dead ends: 82 [2022-11-22 00:33:13,837 INFO L226 Difference]: Without dead ends: 82 [2022-11-22 00:33:13,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:33:13,839 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 87 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:13,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 205 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:33:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-22 00:33:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-22 00:33:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 70 states have internal predecessors, (75), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-11-22 00:33:13,846 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2022-11-22 00:33:13,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:13,846 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-11-22 00:33:13,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-11-22 00:33:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:33:13,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:13,848 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:13,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 00:33:14,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:14,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:14,053 INFO L85 PathProgramCache]: Analyzing trace with hash 194668906, now seen corresponding path program 1 times [2022-11-22 00:33:14,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:14,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557355073] [2022-11-22 00:33:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:14,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:14,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557355073] [2022-11-22 00:33:14,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557355073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:14,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:14,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:33:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894492804] [2022-11-22 00:33:14,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:33:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:33:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:33:14,250 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:14,373 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-22 00:33:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:33:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-22 00:33:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:14,374 INFO L225 Difference]: With dead ends: 77 [2022-11-22 00:33:14,374 INFO L226 Difference]: Without dead ends: 77 [2022-11-22 00:33:14,375 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 [2022-11-22 00:33:14,375 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:14,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-22 00:33:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-22 00:33:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 65 states have internal predecessors, (70), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-22 00:33:14,382 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 20 [2022-11-22 00:33:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:14,382 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-22 00:33:14,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-22 00:33:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:33:14,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:14,384 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:14,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:33:14,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash 194668907, now seen corresponding path program 1 times [2022-11-22 00:33:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:14,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181401553] [2022-11-22 00:33:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:14,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181401553] [2022-11-22 00:33:14,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181401553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:14,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:14,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:33:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894040206] [2022-11-22 00:33:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:33:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:33:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:14,696 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:14,926 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2022-11-22 00:33:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:33:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-22 00:33:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:14,927 INFO L225 Difference]: With dead ends: 134 [2022-11-22 00:33:14,927 INFO L226 Difference]: Without dead ends: 134 [2022-11-22 00:33:14,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:33:14,928 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 170 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:14,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 93 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:33:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-22 00:33:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2022-11-22 00:33:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 43 states have (on average 1.813953488372093) internal successors, (78), 69 states have internal predecessors, (78), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-22 00:33:14,936 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 20 [2022-11-22 00:33:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:14,936 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-22 00:33:14,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-22 00:33:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 00:33:14,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:14,937 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:14,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:33:14,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1739768799, now seen corresponding path program 1 times [2022-11-22 00:33:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:14,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500200305] [2022-11-22 00:33:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:15,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500200305] [2022-11-22 00:33:15,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500200305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:15,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:15,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:33:15,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89730593] [2022-11-22 00:33:15,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:15,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:33:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:15,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:33:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:33:15,518 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:16,835 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2022-11-22 00:33:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:33:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-22 00:33:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:16,837 INFO L225 Difference]: With dead ends: 237 [2022-11-22 00:33:16,837 INFO L226 Difference]: Without dead ends: 237 [2022-11-22 00:33:16,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:33:16,838 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 538 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:16,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 195 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 00:33:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-22 00:33:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 84. [2022-11-22 00:33:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 72 states have internal predecessors, (82), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:33:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-22 00:33:16,847 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 21 [2022-11-22 00:33:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:16,848 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-22 00:33:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:33:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-22 00:33:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 00:33:16,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:16,849 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:16,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:33:16,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:16,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1292239534, now seen corresponding path program 1 times [2022-11-22 00:33:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:16,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866519023] [2022-11-22 00:33:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:16,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:16,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:16,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866519023] [2022-11-22 00:33:16,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866519023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:16,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240127379] [2022-11-22 00:33:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:16,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:16,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:16,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:16,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:33:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:33:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:17,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:17,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240127379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:17,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628241923] [2022-11-22 00:33:17,185 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 00:33:17,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:17,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:17,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:17,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:33:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:33:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,336 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:17,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:17,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,404 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:17,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,534 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:17,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,628 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:17,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,798 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:17,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:17,886 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:17,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,016 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 36 treesize of output 32 [2022-11-22 00:33:18,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:33:18,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,168 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 43 treesize of output 39 [2022-11-22 00:33:18,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,313 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:18,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,399 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:18,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:18,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:18,491 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:18,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:18,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:33:18,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:21,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1628241923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:21,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:33:21,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 20 [2022-11-22 00:33:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600274938] [2022-11-22 00:33:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:33:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:33:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:33:21,804 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:23,498 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-22 00:33:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:33:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-11-22 00:33:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:23,499 INFO L225 Difference]: With dead ends: 115 [2022-11-22 00:33:23,500 INFO L226 Difference]: Without dead ends: 110 [2022-11-22 00:33:23,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:33:23,501 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 111 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:23,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 248 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 00:33:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-22 00:33:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-11-22 00:33:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.609375) internal successors, (103), 91 states have internal predecessors, (103), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:33:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2022-11-22 00:33:23,508 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 23 [2022-11-22 00:33:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:23,509 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2022-11-22 00:33:23,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2022-11-22 00:33:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 00:33:23,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:23,510 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:23,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:23,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1897490764, now seen corresponding path program 1 times [2022-11-22 00:33:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:23,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260905267] [2022-11-22 00:33:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:23,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:23,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260905267] [2022-11-22 00:33:23,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260905267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:23,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72120249] [2022-11-22 00:33:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:23,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:23,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:23,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:23,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:33:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:33:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:23,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:23,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72120249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:23,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:33:23,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-22 00:33:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078469430] [2022-11-22 00:33:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:33:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:33:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:23,873 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:33:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:23,963 INFO L93 Difference]: Finished difference Result 282 states and 334 transitions. [2022-11-22 00:33:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:33:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-11-22 00:33:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:23,965 INFO L225 Difference]: With dead ends: 282 [2022-11-22 00:33:23,966 INFO L226 Difference]: Without dead ends: 282 [2022-11-22 00:33:23,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:33:23,967 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 182 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:23,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 264 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-22 00:33:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 109. [2022-11-22 00:33:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.606060606060606) internal successors, (106), 93 states have internal predecessors, (106), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:33:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-11-22 00:33:23,976 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 22 [2022-11-22 00:33:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:23,976 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-11-22 00:33:23,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:33:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-11-22 00:33:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:33:23,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:23,978 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:23,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:24,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1966086971, now seen corresponding path program 1 times [2022-11-22 00:33:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:24,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141321456] [2022-11-22 00:33:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:24,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:24,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141321456] [2022-11-22 00:33:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141321456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:24,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 00:33:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127781283] [2022-11-22 00:33:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 00:33:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 00:33:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:33:24,828 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:25,396 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-11-22 00:33:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:33:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-22 00:33:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:25,397 INFO L225 Difference]: With dead ends: 112 [2022-11-22 00:33:25,398 INFO L226 Difference]: Without dead ends: 112 [2022-11-22 00:33:25,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:33:25,398 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 312 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:25,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 213 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:33:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-22 00:33:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-22 00:33:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 93 states have internal predecessors, (105), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:33:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-22 00:33:25,404 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 25 [2022-11-22 00:33:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:25,404 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-22 00:33:25,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:33:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-22 00:33:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:33:25,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:25,405 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:25,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:33:25,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash 118458110, now seen corresponding path program 1 times [2022-11-22 00:33:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596624301] [2022-11-22 00:33:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:25,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:25,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:25,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596624301] [2022-11-22 00:33:25,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596624301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:25,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166353116] [2022-11-22 00:33:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:25,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:25,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:25,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:33:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 00:33:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:25,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 00:33:26,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-22 00:33:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:26,399 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:33:26,399 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-22 00:33:26,409 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-22 00:33:26,675 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 35 treesize of output 29 [2022-11-22 00:33:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:33:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:27,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:33:27,451 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 89 treesize of output 91 [2022-11-22 00:33:32,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166353116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:32,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419576194] [2022-11-22 00:33:32,900 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 00:33:32,900 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:32,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:32,901 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:32,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:32,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:32,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:32,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:32,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:33:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:32,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:33:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,058 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:33,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,127 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:33,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,251 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:33,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,337 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:33,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,485 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:33,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,585 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:33,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:33,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,719 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 36 treesize of output 32 [2022-11-22 00:33:33,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:33:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:33,866 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 43 treesize of output 39 [2022-11-22 00:33:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:34,994 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:34,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:35,067 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:35,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:35,140 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:35,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:35,167 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:33:35,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:44,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2767#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_finddup_~i~1#1| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-22 00:33:44,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:33:44,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:33:44,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-22 00:33:44,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965825526] [2022-11-22 00:33:44,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:44,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 00:33:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 00:33:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1782, Unknown=2, NotChecked=0, Total=1980 [2022-11-22 00:33:44,131 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 00:33:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:47,443 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2022-11-22 00:33:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 00:33:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 25 [2022-11-22 00:33:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:47,445 INFO L225 Difference]: With dead ends: 213 [2022-11-22 00:33:47,445 INFO L226 Difference]: Without dead ends: 213 [2022-11-22 00:33:47,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=380, Invalid=3040, Unknown=2, NotChecked=0, Total=3422 [2022-11-22 00:33:47,447 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 475 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:47,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 576 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 00:33:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-22 00:33:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 108. [2022-11-22 00:33:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 91 states have internal predecessors, (102), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:33:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-11-22 00:33:47,454 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 25 [2022-11-22 00:33:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:47,454 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-11-22 00:33:47,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 00:33:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-11-22 00:33:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 00:33:47,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:47,455 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:47,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:47,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:33:47,663 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash -618514571, now seen corresponding path program 1 times [2022-11-22 00:33:47,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:47,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768364211] [2022-11-22 00:33:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:47,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:47,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768364211] [2022-11-22 00:33:47,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768364211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:47,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386915162] [2022-11-22 00:33:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:47,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:47,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:47,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:33:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:47,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:47,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386915162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:47,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1686578120] [2022-11-22 00:33:47,891 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 00:33:47,891 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:47,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:47,892 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:47,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:47,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:47,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:47,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:47,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:33:47,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:47,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:33:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,023 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:48,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,094 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:48,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,216 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:48,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:48,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,301 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:48,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,466 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:48,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,561 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:48,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,679 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 36 treesize of output 32 [2022-11-22 00:33:48,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:48,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,764 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 43 treesize of output 39 [2022-11-22 00:33:48,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:48,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:33:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:50,848 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:50,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:50,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:50,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:50,918 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:50,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:50,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:50,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:50,987 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:50,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:51,014 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:33:51,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:57,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3288#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-22 00:33:57,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:33:57,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:33:57,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-22 00:33:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941165562] [2022-11-22 00:33:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:33:57,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:33:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:33:57,452 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:33:57,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:57,643 INFO L93 Difference]: Finished difference Result 366 states and 434 transitions. [2022-11-22 00:33:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:33:57,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2022-11-22 00:33:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:57,645 INFO L225 Difference]: With dead ends: 366 [2022-11-22 00:33:57,646 INFO L226 Difference]: Without dead ends: 366 [2022-11-22 00:33:57,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:33:57,646 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 297 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:57,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 512 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:33:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-22 00:33:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 118. [2022-11-22 00:33:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 101 states have internal predecessors, (119), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:33:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2022-11-22 00:33:57,655 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 26 [2022-11-22 00:33:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:57,656 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2022-11-22 00:33:57,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:33:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2022-11-22 00:33:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 00:33:57,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:57,657 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:57,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:57,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:33:57,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:33:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash -641204124, now seen corresponding path program 1 times [2022-11-22 00:33:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:57,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665783503] [2022-11-22 00:33:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:57,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:57,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665783503] [2022-11-22 00:33:57,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665783503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:57,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967616953] [2022-11-22 00:33:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:57,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:57,931 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:57,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:33:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:33:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:58,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:33:58,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967616953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101659678] [2022-11-22 00:33:58,092 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-22 00:33:58,092 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:58,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:58,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:58,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,149 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 22 treesize of output 22 [2022-11-22 00:33:58,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:33:58,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,214 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:58,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,282 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,394 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:58,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,479 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:58,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,632 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:58,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,728 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:33:58,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:33:58,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:58,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,833 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 36 treesize of output 32 [2022-11-22 00:33:58,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:58,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,898 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 43 treesize of output 39 [2022-11-22 00:33:58,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:58,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:34:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:00,741 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:00,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:00,817 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:00,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:00,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:00,882 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:00,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:00,909 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-22 00:34:00,913 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:34:00,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:07,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3965#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:34:07,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:34:07,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:07,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-22 00:34:07,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469919862] [2022-11-22 00:34:07,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:34:07,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:34:07,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:34:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:34:07,445 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:07,538 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2022-11-22 00:34:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:34:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-22 00:34:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:07,540 INFO L225 Difference]: With dead ends: 163 [2022-11-22 00:34:07,540 INFO L226 Difference]: Without dead ends: 163 [2022-11-22 00:34:07,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-22 00:34:07,541 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 107 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:07,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 259 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-22 00:34:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2022-11-22 00:34:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.56) internal successors, (117), 101 states have internal predecessors, (117), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:34:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2022-11-22 00:34:07,548 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 29 [2022-11-22 00:34:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:07,548 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2022-11-22 00:34:07,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2022-11-22 00:34:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 00:34:07,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:07,549 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:07,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:34:07,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:07,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1790809280, now seen corresponding path program 1 times [2022-11-22 00:34:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:07,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822656774] [2022-11-22 00:34:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:07,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822656774] [2022-11-22 00:34:07,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822656774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:07,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:07,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:34:07,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531475533] [2022-11-22 00:34:07,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:07,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:34:07,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:34:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:34:07,823 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:07,917 INFO L93 Difference]: Finished difference Result 167 states and 198 transitions. [2022-11-22 00:34:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:34:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-22 00:34:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:07,919 INFO L225 Difference]: With dead ends: 167 [2022-11-22 00:34:07,920 INFO L226 Difference]: Without dead ends: 167 [2022-11-22 00:34:07,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:34:07,920 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 86 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:07,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 473 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-22 00:34:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2022-11-22 00:34:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.5316455696202531) internal successors, (121), 106 states have internal predecessors, (121), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2022-11-22 00:34:07,926 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 29 [2022-11-22 00:34:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:07,926 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2022-11-22 00:34:07,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2022-11-22 00:34:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 00:34:07,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:07,928 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:34:07,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -284603141, now seen corresponding path program 2 times [2022-11-22 00:34:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:07,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411776729] [2022-11-22 00:34:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 00:34:09,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411776729] [2022-11-22 00:34:09,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411776729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:34:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341515646] [2022-11-22 00:34:09,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:34:09,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:09,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:09,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:34:09,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:34:09,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:34:09,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-22 00:34:09,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:09,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:34:09,516 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 [2022-11-22 00:34:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:09,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-22 00:34:09,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-22 00:34:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:09,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:34:09,976 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 6 case distinctions, treesize of input 36 treesize of output 62 [2022-11-22 00:34:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:34:10,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:12,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:34:12,702 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 409 treesize of output 369 [2022-11-22 00:34:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:34:14,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341515646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352548025] [2022-11-22 00:34:14,453 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-22 00:34:14,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:34:14,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:34:14,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:34:14,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:34:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:34:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,588 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:14,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,650 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:14,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:14,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,792 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:14,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,867 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:14,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,011 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:15,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:15,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,097 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:15,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:15,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,224 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 36 treesize of output 32 [2022-11-22 00:34:15,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:15,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,310 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 43 treesize of output 39 [2022-11-22 00:34:15,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:15,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:34:17,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:17,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:17,125 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:17,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:17,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:17,197 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:17,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:17,257 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:17,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:17,282 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-22 00:34:17,286 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:34:17,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:27,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4785#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:34:27,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:34:27,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:27,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 35 [2022-11-22 00:34:27,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062440798] [2022-11-22 00:34:27,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:34:27,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 00:34:27,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 00:34:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2601, Unknown=2, NotChecked=0, Total=2862 [2022-11-22 00:34:27,475 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:34:34,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:34:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:34,668 INFO L93 Difference]: Finished difference Result 323 states and 382 transitions. [2022-11-22 00:34:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:34:34,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-22 00:34:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:34,671 INFO L225 Difference]: With dead ends: 323 [2022-11-22 00:34:34,672 INFO L226 Difference]: Without dead ends: 322 [2022-11-22 00:34:34,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=602, Invalid=4226, Unknown=2, NotChecked=0, Total=4830 [2022-11-22 00:34:34,674 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1454 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 1457 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2375 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-22 00:34:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-22 00:34:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 126. [2022-11-22 00:34:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 108 states have internal predecessors, (122), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2022-11-22 00:34:34,683 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 31 [2022-11-22 00:34:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:34,683 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2022-11-22 00:34:34,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:34:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2022-11-22 00:34:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 00:34:34,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:34,685 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:34,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 00:34:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:34:34,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1798148022, now seen corresponding path program 2 times [2022-11-22 00:34:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190840394] [2022-11-22 00:34:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:35,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:35,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190840394] [2022-11-22 00:34:35,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190840394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:34:35,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539862065] [2022-11-22 00:34:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:34:35,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:35,076 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:35,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:34:35,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:34:35,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:34:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:34:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:34:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:35,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:34:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:34:35,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539862065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:35,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833962967] [2022-11-22 00:34:35,569 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 00:34:35,570 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:34:35,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:34:35,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:34:35,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:35,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:34:35,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:34:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,706 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:35,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:35,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,767 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:35,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,880 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:35,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:35,952 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:35,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:36,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,101 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:36,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:36,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,192 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:36,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:36,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,288 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 36 treesize of output 32 [2022-11-22 00:34:36,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,361 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 43 treesize of output 39 [2022-11-22 00:34:36,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:34:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:38,102 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:38,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:38,167 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:38,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:38,235 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:38,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:38,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:34:38,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:45,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5479#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-22 00:34:45,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:34:45,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:45,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-22 00:34:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230529344] [2022-11-22 00:34:45,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:34:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 00:34:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 00:34:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 00:34:45,637 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:34:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:46,754 INFO L93 Difference]: Finished difference Result 259 states and 303 transitions. [2022-11-22 00:34:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 00:34:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 30 [2022-11-22 00:34:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:46,756 INFO L225 Difference]: With dead ends: 259 [2022-11-22 00:34:46,756 INFO L226 Difference]: Without dead ends: 259 [2022-11-22 00:34:46,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 00:34:46,758 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 915 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:46,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 460 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:34:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-22 00:34:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 125. [2022-11-22 00:34:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 107 states have internal predecessors, (120), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2022-11-22 00:34:46,765 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 30 [2022-11-22 00:34:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:46,766 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2022-11-22 00:34:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:34:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2022-11-22 00:34:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 00:34:46,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:46,767 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:46,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:34:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:34:46,973 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash -91986188, now seen corresponding path program 1 times [2022-11-22 00:34:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:46,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334081421] [2022-11-22 00:34:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:46,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:47,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:47,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334081421] [2022-11-22 00:34:47,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334081421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:34:47,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715662894] [2022-11-22 00:34:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:47,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:34:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:47,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 00:34:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:47,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:47,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-22 00:34:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:47,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715662894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886072395] [2022-11-22 00:34:47,688 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 00:34:47,688 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:34:47,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:34:47,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:34:47,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:34:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:34:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,813 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:47,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,878 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:47,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:47,980 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:47,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:48,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,050 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:48,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:48,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,177 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:48,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:48,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,247 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:48,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:48,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,336 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 36 treesize of output 32 [2022-11-22 00:34:48,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,408 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 43 treesize of output 39 [2022-11-22 00:34:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:34:48,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:48,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:34:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:49,910 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:49,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:49,966 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:49,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:50,029 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:34:50,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:34:50,056 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:34:50,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:57,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6106#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-22 00:34:57,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:34:57,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:57,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-22 00:34:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557525141] [2022-11-22 00:34:57,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:34:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 00:34:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 00:34:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 00:34:57,236 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:34:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:58,546 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2022-11-22 00:34:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 00:34:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-22 00:34:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:58,548 INFO L225 Difference]: With dead ends: 297 [2022-11-22 00:34:58,548 INFO L226 Difference]: Without dead ends: 297 [2022-11-22 00:34:58,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:34:58,549 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1062 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:58,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 717 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:34:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-22 00:34:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 125. [2022-11-22 00:34:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 107 states have internal predecessors, (119), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-11-22 00:34:58,558 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 31 [2022-11-22 00:34:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:58,558 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-11-22 00:34:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:34:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-11-22 00:34:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 00:34:58,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:58,560 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:58,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:34:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 00:34:58,765 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586004, now seen corresponding path program 1 times [2022-11-22 00:34:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:58,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884733831] [2022-11-22 00:34:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:58,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:34:58,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:58,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884733831] [2022-11-22 00:34:58,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884733831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:58,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:58,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:34:58,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717625554] [2022-11-22 00:34:58,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:58,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:34:58,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:34:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:34:58,922 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:58,997 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2022-11-22 00:34:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:34:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-22 00:34:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:59,000 INFO L225 Difference]: With dead ends: 124 [2022-11-22 00:34:59,000 INFO L226 Difference]: Without dead ends: 124 [2022-11-22 00:34:59,000 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 [2022-11-22 00:34:59,001 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:59,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-22 00:34:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-22 00:34:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 106 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-11-22 00:34:59,006 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 33 [2022-11-22 00:34:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:59,007 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-11-22 00:34:59,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-11-22 00:34:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 00:34:59,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:59,008 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 00:34:59,009 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586005, now seen corresponding path program 1 times [2022-11-22 00:34:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:59,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702431556] [2022-11-22 00:34:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:34:59,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702431556] [2022-11-22 00:34:59,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702431556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:59,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:59,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:34:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393206743] [2022-11-22 00:34:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:59,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:34:59,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:34:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:34:59,160 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:59,220 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2022-11-22 00:34:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:34:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-22 00:34:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:59,222 INFO L225 Difference]: With dead ends: 123 [2022-11-22 00:34:59,222 INFO L226 Difference]: Without dead ends: 123 [2022-11-22 00:34:59,222 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 [2022-11-22 00:34:59,223 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:59,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-22 00:34:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-22 00:34:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 105 states have internal predecessors, (117), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2022-11-22 00:34:59,228 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 33 [2022-11-22 00:34:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:59,228 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2022-11-22 00:34:59,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2022-11-22 00:34:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 00:34:59,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:59,229 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:59,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 00:34:59,230 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash -171408707, now seen corresponding path program 1 times [2022-11-22 00:34:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:59,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378032337] [2022-11-22 00:34:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:34:59,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:59,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378032337] [2022-11-22 00:34:59,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378032337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:59,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:34:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918946288] [2022-11-22 00:34:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:59,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:34:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:34:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:34:59,300 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:59,362 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2022-11-22 00:34:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:34:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-22 00:34:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:59,363 INFO L225 Difference]: With dead ends: 122 [2022-11-22 00:34:59,364 INFO L226 Difference]: Without dead ends: 122 [2022-11-22 00:34:59,364 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 [2022-11-22 00:34:59,364 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:59,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-22 00:34:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-22 00:34:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 104 states have internal predecessors, (116), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-22 00:34:59,370 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 34 [2022-11-22 00:34:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:59,370 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-22 00:34:59,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-22 00:34:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 00:34:59,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:59,371 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 00:34:59,372 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -171408706, now seen corresponding path program 1 times [2022-11-22 00:34:59,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173524742] [2022-11-22 00:34:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:34:59,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:59,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173524742] [2022-11-22 00:34:59,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173524742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:59,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:59,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:34:59,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598899653] [2022-11-22 00:34:59,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:59,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:34:59,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:34:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:34:59,490 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:59,553 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2022-11-22 00:34:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:34:59,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-22 00:34:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:59,554 INFO L225 Difference]: With dead ends: 121 [2022-11-22 00:34:59,554 INFO L226 Difference]: Without dead ends: 121 [2022-11-22 00:34:59,554 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 [2022-11-22 00:34:59,555 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:59,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 63 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-22 00:34:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-22 00:34:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 103 states have internal predecessors, (115), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:34:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-22 00:34:59,560 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 34 [2022-11-22 00:34:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:59,560 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-22 00:34:59,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:34:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-22 00:34:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:34:59,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:59,561 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-22 00:34:59,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 00:34:59,562 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:34:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2081921806, now seen corresponding path program 1 times [2022-11-22 00:34:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:59,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770723537] [2022-11-22 00:34:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:59,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:59,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770723537] [2022-11-22 00:34:59,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770723537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:59,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:59,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 00:34:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37837443] [2022-11-22 00:34:59,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 00:34:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 00:34:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:34:59,848 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:35:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:00,227 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-11-22 00:35:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:35:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-11-22 00:35:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:00,229 INFO L225 Difference]: With dead ends: 164 [2022-11-22 00:35:00,229 INFO L226 Difference]: Without dead ends: 164 [2022-11-22 00:35:00,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:35:00,229 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 142 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:00,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 388 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:35:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-22 00:35:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-11-22 00:35:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 104 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:35:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2022-11-22 00:35:00,236 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 36 [2022-11-22 00:35:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:00,236 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2022-11-22 00:35:00,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:35:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2022-11-22 00:35:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 00:35:00,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:00,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:35:00,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 00:35:00,238 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:35:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1015048301, now seen corresponding path program 2 times [2022-11-22 00:35:00,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:00,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816897983] [2022-11-22 00:35:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:00,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:35:00,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816897983] [2022-11-22 00:35:00,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816897983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940075132] [2022-11-22 00:35:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:35:00,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:00,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:00,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:35:00,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:35:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:35:00,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:35:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:35:00,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:35:00,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940075132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:00,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474203694] [2022-11-22 00:35:00,931 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 00:35:00,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:35:00,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:35:00,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:35:00,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:35:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:00,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:35:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:35:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,061 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:01,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,135 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:01,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,257 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:01,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,377 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:01,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,522 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:01,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,609 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:01,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:01,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,730 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 36 treesize of output 32 [2022-11-22 00:35:01,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,809 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 43 treesize of output 39 [2022-11-22 00:35:01,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:35:03,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:03,477 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:03,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:03,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:03,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:03,546 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:03,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:03,609 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:03,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:03,632 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:35:03,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:35:11,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8097#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-22 00:35:11,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:35:11,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:35:11,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-22 00:35:11,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709608908] [2022-11-22 00:35:11,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:35:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 00:35:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:35:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 00:35:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 00:35:11,584 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:35:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:13,387 INFO L93 Difference]: Finished difference Result 450 states and 521 transitions. [2022-11-22 00:35:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 00:35:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-22 00:35:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:13,392 INFO L225 Difference]: With dead ends: 450 [2022-11-22 00:35:13,392 INFO L226 Difference]: Without dead ends: 450 [2022-11-22 00:35:13,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=643, Invalid=3647, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 00:35:13,394 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1380 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:13,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 918 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 00:35:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-22 00:35:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 138. [2022-11-22 00:35:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 99 states have (on average 1.404040404040404) internal successors, (139), 119 states have internal predecessors, (139), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:35:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2022-11-22 00:35:13,402 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 35 [2022-11-22 00:35:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:13,403 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2022-11-22 00:35:13,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 00:35:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2022-11-22 00:35:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:35:13,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:13,404 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:35:13,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:35:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:13,610 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:35:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash -43186018, now seen corresponding path program 1 times [2022-11-22 00:35:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:13,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96471380] [2022-11-22 00:35:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:35:14,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:14,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96471380] [2022-11-22 00:35:14,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96471380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:14,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221327428] [2022-11-22 00:35:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:14,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:14,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:14,103 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:14,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:35:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 00:35:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:14,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:35:14,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:35:14,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 00:35:14,552 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 17 treesize of output 9 [2022-11-22 00:35:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:35:14,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:14,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:35:14,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-22 00:35:14,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:35:14,831 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 34 treesize of output 37 [2022-11-22 00:35:14,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 00:35:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:35:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221327428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814811628] [2022-11-22 00:35:15,036 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-22 00:35:15,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:35:15,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:35:15,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:35:15,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:35:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:35:15,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:35:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,171 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:15,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,240 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:15,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,353 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:15,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,444 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:15,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,561 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:15,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:15,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,666 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:15,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:15,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:15,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,751 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 36 treesize of output 32 [2022-11-22 00:35:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:15,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:35:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:15,873 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 43 treesize of output 39 [2022-11-22 00:35:16,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:35:16,101 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 8 treesize of output 7 [2022-11-22 00:35:16,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-22 00:35:16,267 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 8 treesize of output 7 [2022-11-22 00:35:16,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:16,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:35:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:16,807 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:16,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:35:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:17,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:17,369 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:17,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:35:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:17,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:17,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:17,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:18,034 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:18,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:35:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:18,149 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:18,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:18,215 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:18,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:18,294 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:18,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:18,318 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-22 00:35:18,329 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:35:18,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:35:39,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9012#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:35:39,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:35:39,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:35:39,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-11-22 00:35:39,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959832674] [2022-11-22 00:35:39,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:35:39,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 00:35:39,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:35:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 00:35:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2468, Unknown=11, NotChecked=0, Total=2862 [2022-11-22 00:35:39,482 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 00:35:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:41,224 INFO L93 Difference]: Finished difference Result 184 states and 215 transitions. [2022-11-22 00:35:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 00:35:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-22 00:35:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:41,232 INFO L225 Difference]: With dead ends: 184 [2022-11-22 00:35:41,232 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 00:35:41,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=867, Invalid=4672, Unknown=11, NotChecked=0, Total=5550 [2022-11-22 00:35:41,234 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 930 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:41,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 651 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:35:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 00:35:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 143. [2022-11-22 00:35:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 102 states have (on average 1.392156862745098) internal successors, (142), 123 states have internal predecessors, (142), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 00:35:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-11-22 00:35:41,240 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 37 [2022-11-22 00:35:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:41,241 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-11-22 00:35:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 00:35:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-11-22 00:35:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 00:35:41,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:41,242 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:35:41,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:35:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 00:35:41,447 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:35:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -986850864, now seen corresponding path program 3 times [2022-11-22 00:35:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:41,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403043455] [2022-11-22 00:35:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 00:35:49,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:49,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403043455] [2022-11-22 00:35:49,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403043455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:49,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312483975] [2022-11-22 00:35:49,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:35:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:49,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:49,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:35:49,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:35:49,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:35:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-22 00:35:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:49,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 00:35:50,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-22 00:35:50,250 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-22 00:35:51,647 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 55 treesize of output 41 [2022-11-22 00:35:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:35:51,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:54,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312483975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:54,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [361955176] [2022-11-22 00:35:54,816 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-22 00:35:54,816 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:35:54,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:35:54,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:35:54,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:35:54,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:35:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:35:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,947 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:54,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:54,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,007 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:55,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,112 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:55,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:55,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,205 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:55,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:55,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,351 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:55,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,449 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:55,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:55,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:55,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,549 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 36 treesize of output 32 [2022-11-22 00:35:55,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:35:55,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:35:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:55,686 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 43 treesize of output 39 [2022-11-22 00:35:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:57,365 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:57,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:57,435 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:57,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:57,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:57,499 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:35:57,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:35:57,525 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-22 00:35:57,528 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:35:57,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:36:06,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9649#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:36:06,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:36:06,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:36:06,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-22 00:36:06,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095107584] [2022-11-22 00:36:06,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:36:06,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 00:36:06,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 00:36:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3100, Unknown=1, NotChecked=0, Total=3422 [2022-11-22 00:36:06,764 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 00:36:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:10,040 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-11-22 00:36:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 00:36:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2022-11-22 00:36:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:10,041 INFO L225 Difference]: With dead ends: 125 [2022-11-22 00:36:10,041 INFO L226 Difference]: Without dead ends: 125 [2022-11-22 00:36:10,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=409, Invalid=3750, Unknown=1, NotChecked=0, Total=4160 [2022-11-22 00:36:10,043 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 59 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:10,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 714 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 00:36:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-22 00:36:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-11-22 00:36:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.36986301369863) internal successors, (100), 94 states have internal predecessors, (100), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-11-22 00:36:10,048 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 41 [2022-11-22 00:36:10,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:10,048 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-11-22 00:36:10,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 00:36:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-11-22 00:36:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 00:36:10,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:10,049 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:10,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:36:10,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:36:10,255 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286436, now seen corresponding path program 1 times [2022-11-22 00:36:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:10,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476498789] [2022-11-22 00:36:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:10,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:36:10,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:10,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476498789] [2022-11-22 00:36:10,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476498789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:10,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:10,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:36:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68548842] [2022-11-22 00:36:10,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:10,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:36:10,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:36:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:36:10,319 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:36:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:10,396 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2022-11-22 00:36:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:36:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-22 00:36:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:10,398 INFO L225 Difference]: With dead ends: 109 [2022-11-22 00:36:10,398 INFO L226 Difference]: Without dead ends: 109 [2022-11-22 00:36:10,398 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 [2022-11-22 00:36:10,399 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:10,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:36:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-22 00:36:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-22 00:36:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 90 states have internal predecessors, (96), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2022-11-22 00:36:10,403 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 41 [2022-11-22 00:36:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:10,404 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2022-11-22 00:36:10,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:36:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2022-11-22 00:36:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 00:36:10,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:10,405 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 00:36:10,405 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286435, now seen corresponding path program 1 times [2022-11-22 00:36:10,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601092019] [2022-11-22 00:36:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:10,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:36:10,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601092019] [2022-11-22 00:36:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601092019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:10,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:10,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:36:10,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825422825] [2022-11-22 00:36:10,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:10,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:36:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:36:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:36:10,542 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:36:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:10,638 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-11-22 00:36:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:36:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-22 00:36:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:10,640 INFO L225 Difference]: With dead ends: 105 [2022-11-22 00:36:10,640 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 00:36:10,640 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 [2022-11-22 00:36:10,640 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:10,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:36:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 00:36:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-22 00:36:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 86 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2022-11-22 00:36:10,644 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 41 [2022-11-22 00:36:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:10,644 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2022-11-22 00:36:10,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:36:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2022-11-22 00:36:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 00:36:10,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:10,645 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:10,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-22 00:36:10,645 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:10,646 INFO L85 PathProgramCache]: Analyzing trace with hash 12704851, now seen corresponding path program 1 times [2022-11-22 00:36:10,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:10,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565376327] [2022-11-22 00:36:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:10,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:36:10,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565376327] [2022-11-22 00:36:10,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565376327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:10,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:10,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:36:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074865779] [2022-11-22 00:36:10,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:36:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:36:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:36:10,839 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:11,005 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-11-22 00:36:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:36:11,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2022-11-22 00:36:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:11,007 INFO L225 Difference]: With dead ends: 107 [2022-11-22 00:36:11,007 INFO L226 Difference]: Without dead ends: 107 [2022-11-22 00:36:11,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:36:11,007 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 86 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:11,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 228 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:36:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-22 00:36:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-22 00:36:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 86 states have internal predecessors, (91), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-11-22 00:36:11,011 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 45 [2022-11-22 00:36:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:11,012 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-11-22 00:36:11,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-11-22 00:36:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 00:36:11,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:11,013 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:11,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 00:36:11,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash 231963315, now seen corresponding path program 1 times [2022-11-22 00:36:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:11,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513683435] [2022-11-22 00:36:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:36:11,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:11,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513683435] [2022-11-22 00:36:11,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513683435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:11,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:11,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:36:11,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019294624] [2022-11-22 00:36:11,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:11,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:36:11,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:36:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:36:11,261 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:11,470 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2022-11-22 00:36:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:36:11,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-22 00:36:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:11,471 INFO L225 Difference]: With dead ends: 111 [2022-11-22 00:36:11,472 INFO L226 Difference]: Without dead ends: 111 [2022-11-22 00:36:11,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:36:11,472 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 104 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:11,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 211 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:36:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-22 00:36:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-11-22 00:36:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.236842105263158) internal successors, (94), 90 states have internal predecessors, (94), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 00:36:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-11-22 00:36:11,476 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 46 [2022-11-22 00:36:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:11,476 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-11-22 00:36:11,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-11-22 00:36:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 00:36:11,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:11,477 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-11-22 00:36:11,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 00:36:11,478 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash 778226521, now seen corresponding path program 1 times [2022-11-22 00:36:11,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824632770] [2022-11-22 00:36:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:11,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:36:11,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824632770] [2022-11-22 00:36:11,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824632770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:36:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137556101] [2022-11-22 00:36:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:11,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:36:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:36:11,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:36:11,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:36:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:36:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:36:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:36:12,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:36:12,157 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 [2022-11-22 00:36:12,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 00:36:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:36:12,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:36:12,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137556101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:12,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:36:12,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-22 00:36:12,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99955348] [2022-11-22 00:36:12,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:36:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:36:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:36:12,239 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:36:13,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:36:15,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:36:17,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:36:19,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:36:21,646 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] [2022-11-22 00:36:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:21,849 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-11-22 00:36:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:36:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-22 00:36:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:21,850 INFO L225 Difference]: With dead ends: 129 [2022-11-22 00:36:21,850 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 00:36:21,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:36:21,851 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 102 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 24 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:21,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 288 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 189 Invalid, 5 Unknown, 0 Unchecked, 9.5s Time] [2022-11-22 00:36:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 00:36:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2022-11-22 00:36:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 101 states have internal predecessors, (106), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-11-22 00:36:21,855 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 46 [2022-11-22 00:36:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:21,855 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-11-22 00:36:21,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:36:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-11-22 00:36:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 00:36:21,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:21,856 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:21,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:36:22,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 00:36:22,057 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:22,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522291, now seen corresponding path program 1 times [2022-11-22 00:36:22,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:22,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444402479] [2022-11-22 00:36:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:22,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 00:36:22,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:22,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444402479] [2022-11-22 00:36:22,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444402479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:22,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:22,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:36:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393818049] [2022-11-22 00:36:22,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:36:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:36:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:36:22,150 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:22,224 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-11-22 00:36:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:36:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-11-22 00:36:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:22,225 INFO L225 Difference]: With dead ends: 121 [2022-11-22 00:36:22,226 INFO L226 Difference]: Without dead ends: 121 [2022-11-22 00:36:22,226 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 [2022-11-22 00:36:22,227 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:22,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:36:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-22 00:36:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-22 00:36:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 97 states have internal predecessors, (102), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-11-22 00:36:22,231 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 50 [2022-11-22 00:36:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:22,232 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-11-22 00:36:22,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-11-22 00:36:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 00:36:22,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:22,233 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:22,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-22 00:36:22,233 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:22,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522290, now seen corresponding path program 1 times [2022-11-22 00:36:22,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:22,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045686521] [2022-11-22 00:36:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 00:36:22,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:22,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045686521] [2022-11-22 00:36:22,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045686521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:22,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:22,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:36:22,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74227640] [2022-11-22 00:36:22,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:22,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:36:22,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:22,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:36:22,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:36:22,377 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:22,443 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-11-22 00:36:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:36:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-11-22 00:36:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:22,444 INFO L225 Difference]: With dead ends: 117 [2022-11-22 00:36:22,444 INFO L226 Difference]: Without dead ends: 117 [2022-11-22 00:36:22,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:36:22,445 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:22,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:36:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-22 00:36:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-22 00:36:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 93 states have internal predecessors, (98), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 00:36:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2022-11-22 00:36:22,450 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 50 [2022-11-22 00:36:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:22,450 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2022-11-22 00:36:22,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 00:36:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2022-11-22 00:36:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 00:36:22,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:22,452 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:22,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-22 00:36:22,453 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:36:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1761697376, now seen corresponding path program 1 times [2022-11-22 00:36:22,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:22,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062473719] [2022-11-22 00:36:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:36:22,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:22,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062473719] [2022-11-22 00:36:22,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062473719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:36:22,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354971992] [2022-11-22 00:36:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:22,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:36:22,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:36:22,992 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:36:23,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:36:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 00:36:23,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:36:23,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:36:23,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:36:23,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-22 00:36:23,922 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:36:23,922 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 29 treesize of output 17 [2022-11-22 00:36:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:36:24,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:36:24,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:36:24,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-22 00:36:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:36:25,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354971992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:36:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536038333] [2022-11-22 00:36:25,207 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-22 00:36:25,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:36:25,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:36:25,208 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:36:25,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:36:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:36:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:36:25,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,340 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:25,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,397 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:25,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:25,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,499 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:25,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,580 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:25,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,707 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:25,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,801 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:25,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:25,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:25,922 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 36 treesize of output 32 [2022-11-22 00:36:26,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:36:26,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:26,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,065 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 43 treesize of output 39 [2022-11-22 00:36:26,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:36:26,315 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 8 treesize of output 7 [2022-11-22 00:36:26,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 72 [2022-11-22 00:36:26,489 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 8 treesize of output 7 [2022-11-22 00:36:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:26,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:26,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:26,802 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:26,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:27,072 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:27,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:27,682 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:27,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:28,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:28,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:28,378 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:28,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:29,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:29,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:29,879 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:29,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:30,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:30,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:30,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:30,189 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:30,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:31,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:31,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:31,534 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:31,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:31,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:31,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:31,838 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:31,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:32,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:32,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:32,435 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:32,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:32,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:32,663 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:32,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:36:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,748 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:32,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:32,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,808 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:32,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:32,869 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:36:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:36:32,893 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-22 00:36:32,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:36:32,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:37:08,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12065#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:37:08,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:37:08,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:37:08,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 32 [2022-11-22 00:37:08,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092658149] [2022-11-22 00:37:08,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:37:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 00:37:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:37:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 00:37:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 00:37:08,789 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-22 00:37:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:10,775 INFO L93 Difference]: Finished difference Result 202 states and 212 transitions. [2022-11-22 00:37:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 00:37:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-11-22 00:37:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:10,777 INFO L225 Difference]: With dead ends: 202 [2022-11-22 00:37:10,777 INFO L226 Difference]: Without dead ends: 200 [2022-11-22 00:37:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=859, Invalid=5303, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 00:37:10,779 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 699 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 430 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 00:37:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-22 00:37:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2022-11-22 00:37:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 142 states have (on average 1.091549295774648) internal successors, (155), 148 states have internal predecessors, (155), 24 states have call successors, (24), 17 states have call predecessors, (24), 16 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-22 00:37:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2022-11-22 00:37:10,786 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 54 [2022-11-22 00:37:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:10,788 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2022-11-22 00:37:10,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-22 00:37:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2022-11-22 00:37:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 00:37:10,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:10,790 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:37:10,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:37:10,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-22 00:37:10,996 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:37:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 160485480, now seen corresponding path program 1 times [2022-11-22 00:37:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:37:10,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962528040] [2022-11-22 00:37:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:37:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:37:11,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:37:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962528040] [2022-11-22 00:37:11,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962528040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:37:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074889431] [2022-11-22 00:37:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:11,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:37:11,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:37:11,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:37:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 00:37:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:11,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:37:11,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 00:37:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:37:11,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:11,703 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 32 treesize of output 28 [2022-11-22 00:37:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 00:37:11,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074889431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863353804] [2022-11-22 00:37:11,883 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 00:37:11,883 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:37:11,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:37:11,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:37:11,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:37:11,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:11,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:37:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:11,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:11,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:37:11,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:11,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,011 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:12,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,070 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:12,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:12,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,250 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:12,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,368 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:12,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,442 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:12,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:12,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,561 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 36 treesize of output 32 [2022-11-22 00:37:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,630 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 43 treesize of output 39 [2022-11-22 00:37:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:12,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:37:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:14,386 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-22 00:37:14,386 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 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-22 00:37:14,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:14,505 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 00:37:14,505 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-22 00:37:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:16,677 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:16,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:16,743 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:16,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:16,813 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:16,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:16,847 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-22 00:37:16,857 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:37:16,870 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:37:33,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12861#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:37:33,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:37:33,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:37:33,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-11-22 00:37:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581234862] [2022-11-22 00:37:33,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:37:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 00:37:33,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:37:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 00:37:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1951, Unknown=1, NotChecked=0, Total=2162 [2022-11-22 00:37:33,544 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:37:35,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:37:37,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:37:39,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:37:41,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:37:43,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:37:45,261 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] [2022-11-22 00:37:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:45,513 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2022-11-22 00:37:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:37:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-11-22 00:37:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:45,515 INFO L225 Difference]: With dead ends: 189 [2022-11-22 00:37:45,515 INFO L226 Difference]: Without dead ends: 189 [2022-11-22 00:37:45,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=299, Invalid=2670, Unknown=1, NotChecked=0, Total=2970 [2022-11-22 00:37:45,516 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 194 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 41 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:45,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 443 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 319 Invalid, 6 Unknown, 0 Unchecked, 11.8s Time] [2022-11-22 00:37:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-22 00:37:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-11-22 00:37:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 147 states have internal predecessors, (154), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 00:37:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 198 transitions. [2022-11-22 00:37:45,521 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 198 transitions. Word has length 55 [2022-11-22 00:37:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:45,522 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 198 transitions. [2022-11-22 00:37:45,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 00:37:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 198 transitions. [2022-11-22 00:37:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 00:37:45,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:45,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:37:45,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 00:37:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 00:37:45,733 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:37:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash -721790580, now seen corresponding path program 1 times [2022-11-22 00:37:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:37:45,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752248925] [2022-11-22 00:37:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:37:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:37:46,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:37:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752248925] [2022-11-22 00:37:46,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752248925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:37:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653927471] [2022-11-22 00:37:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:37:46,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:37:46,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 00:37:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-22 00:37:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:46,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:37:47,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:37:47,120 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 21 treesize of output 20 [2022-11-22 00:37:48,125 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:37:48,126 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 42 treesize of output 26 [2022-11-22 00:37:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 00:37:48,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:37:48,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653927471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:37:48,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:37:48,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 26 [2022-11-22 00:37:48,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011170617] [2022-11-22 00:37:48,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:37:48,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:37:48,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:37:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:37:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:37:48,167 INFO L87 Difference]: Start difference. First operand 185 states and 198 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:37:50,287 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] [2022-11-22 00:37:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:50,949 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2022-11-22 00:37:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:37:50,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2022-11-22 00:37:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:50,951 INFO L225 Difference]: With dead ends: 184 [2022-11-22 00:37:50,951 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 00:37:50,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 00:37:50,951 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:50,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 121 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 00:37:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 00:37:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-22 00:37:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.0633802816901408) internal successors, (151), 146 states have internal predecessors, (151), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 00:37:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2022-11-22 00:37:50,957 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 58 [2022-11-22 00:37:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:50,958 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2022-11-22 00:37:50,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:37:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2022-11-22 00:37:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 00:37:50,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:50,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:37:50,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 00:37:51,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:51,165 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:37:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:51,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2143956239, now seen corresponding path program 1 times [2022-11-22 00:37:51,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:37:51,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618306733] [2022-11-22 00:37:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:51,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:37:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:37:51,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:37:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618306733] [2022-11-22 00:37:51,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618306733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:37:51,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:37:51,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:37:51,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698223523] [2022-11-22 00:37:51,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:37:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:37:51,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:37:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:37:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:37:51,626 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 00:37:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:52,177 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2022-11-22 00:37:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:37:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-11-22 00:37:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:52,179 INFO L225 Difference]: With dead ends: 184 [2022-11-22 00:37:52,179 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 00:37:52,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:37:52,180 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 121 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:52,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 174 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:37:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 00:37:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-22 00:37:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 146 states have internal predecessors, (149), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 00:37:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2022-11-22 00:37:52,185 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 60 [2022-11-22 00:37:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:52,185 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2022-11-22 00:37:52,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 00:37:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2022-11-22 00:37:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 00:37:52,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:52,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:37:52,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-22 00:37:52,186 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:37:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1395584350, now seen corresponding path program 1 times [2022-11-22 00:37:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:37:52,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093088372] [2022-11-22 00:37:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:37:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:37:52,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:37:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093088372] [2022-11-22 00:37:52,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093088372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:37:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876322008] [2022-11-22 00:37:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:37:52,872 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:37:52,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 00:37:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:53,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 00:37:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:53,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:37:53,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:37:53,597 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 25 treesize of output 20 [2022-11-22 00:37:54,154 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:37:54,154 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 35 treesize of output 19 [2022-11-22 00:37:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:37:54,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:54,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:37:54,443 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 706 treesize of output 654 [2022-11-22 00:37:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:37:55,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876322008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977121687] [2022-11-22 00:37:55,567 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-22 00:37:55,567 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:37:55,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:37:55,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:37:55,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:37:55,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:37:55,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:37:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,685 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:55,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,744 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:55,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,850 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:55,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:55,918 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:55,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,044 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:56,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,155 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:56,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:56,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:56,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,270 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 36 treesize of output 32 [2022-11-22 00:37:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,332 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 43 treesize of output 39 [2022-11-22 00:37:56,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:56,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:37:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:56,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:57,015 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:37:57,015 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 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-22 00:37:57,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:57,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:57,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:57,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:37:57,120 INFO L321 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-11-22 00:37:57,121 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2022-11-22 00:37:59,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:59,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:59,209 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:59,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:59,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:59,277 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:59,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:59,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:59,336 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:37:59,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:37:59,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-22 00:37:59,367 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:37:59,380 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:38:22,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14653#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:38:22,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:38:22,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:38:22,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2022-11-22 00:38:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184419310] [2022-11-22 00:38:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:38:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 00:38:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:38:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 00:38:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4909, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 00:38:22,411 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-22 00:38:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:38:25,936 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-11-22 00:38:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 00:38:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 62 [2022-11-22 00:38:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:38:25,939 INFO L225 Difference]: With dead ends: 243 [2022-11-22 00:38:25,940 INFO L226 Difference]: Without dead ends: 239 [2022-11-22 00:38:25,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3622 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=928, Invalid=9172, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 00:38:25,942 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 726 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:38:25,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 694 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:38:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-22 00:38:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 121. [2022-11-22 00:38:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:38:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-11-22 00:38:25,948 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 62 [2022-11-22 00:38:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:38:25,948 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-11-22 00:38:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-22 00:38:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-11-22 00:38:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:38:25,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:38:25,949 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:38:25,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 00:38:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-22 00:38:26,159 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:38:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:38:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 99582740, now seen corresponding path program 1 times [2022-11-22 00:38:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:38:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050540319] [2022-11-22 00:38:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:38:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:38:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:38:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:38:27,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:38:27,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050540319] [2022-11-22 00:38:27,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050540319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:38:27,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368076480] [2022-11-22 00:38:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:38:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:38:27,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:38:27,572 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:38:27,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 00:38:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:38:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-22 00:38:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:38:27,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 00:38:28,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-22 00:38:28,326 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-22 00:38:28,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:38:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:29,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-11-22 00:38:29,402 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 8 treesize of output 7 [2022-11-22 00:38:29,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:29,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:29,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-22 00:38:29,556 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 8 treesize of output 7 [2022-11-22 00:38:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:33,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:33,186 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:38:33,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2022-11-22 00:38:33,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-22 00:38:33,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-22 00:38:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 00:38:33,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:38:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:34,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-22 00:38:39,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368076480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:38:39,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566164496] [2022-11-22 00:38:39,737 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-22 00:38:39,737 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:38:39,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:38:39,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:38:39,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:38:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:38:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:38:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,883 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:39,948 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:39,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,074 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:40,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,167 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:40,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:40,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,296 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:40,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:40,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,387 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:40,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:40,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:40,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,491 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 36 treesize of output 32 [2022-11-22 00:38:40,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,559 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 43 treesize of output 39 [2022-11-22 00:38:40,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:38:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:38:40,871 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 8 treesize of output 7 [2022-11-22 00:38:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:40,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-22 00:38:41,017 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 8 treesize of output 7 [2022-11-22 00:38:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,219 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:41,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,431 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:41,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:41,878 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:41,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:42,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:42,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:42,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:42,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:42,137 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:42,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:43,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:43,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:43,234 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:43,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:43,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:43,785 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:43,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:44,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:44,921 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:44,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:45,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,171 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:45,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,784 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:45,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:45,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:45,994 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:45,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,197 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:46,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,642 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:46,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:38:46,981 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:46,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-22 00:38:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:47,062 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:47,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:47,130 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:47,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:47,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:38:47,191 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:38:47,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:38:47,215 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 163 for LOIs [2022-11-22 00:38:47,455 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:38:47,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:39:55,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15507#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:39:55,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:39:55,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:39:55,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-11-22 00:39:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974801029] [2022-11-22 00:39:55,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:39:55,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 00:39:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:39:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 00:39:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=6518, Unknown=2, NotChecked=0, Total=7482 [2022-11-22 00:39:55,207 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-22 00:40:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:40:07,295 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-11-22 00:40:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-22 00:40:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 64 [2022-11-22 00:40:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:40:07,296 INFO L225 Difference]: With dead ends: 162 [2022-11-22 00:40:07,296 INFO L226 Difference]: Without dead ends: 80 [2022-11-22 00:40:07,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 89 SyntacticMatches, 26 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 86.6s TimeCoverageRelationStatistics Valid=1767, Invalid=11113, Unknown=2, NotChecked=0, Total=12882 [2022-11-22 00:40:07,299 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 370 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:40:07,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 347 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 00:40:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-22 00:40:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-22 00:40:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:40:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-11-22 00:40:07,303 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 64 [2022-11-22 00:40:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:40:07,303 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-11-22 00:40:07,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-22 00:40:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-11-22 00:40:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:40:07,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:40:07,304 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:40:07,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 00:40:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-22 00:40:07,512 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:40:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:40:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1985221542, now seen corresponding path program 1 times [2022-11-22 00:40:07,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:40:07,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133262460] [2022-11-22 00:40:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:07,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:40:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:40:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:40:08,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:40:08,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133262460] [2022-11-22 00:40:08,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133262460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:40:08,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54912481] [2022-11-22 00:40:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:08,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:40:08,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:40:08,244 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:40:08,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 00:40:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:40:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 00:40:08,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:40:08,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:40:09,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:40:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:40:09,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:40:09,796 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 42 treesize of output 38 [2022-11-22 00:40:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:40:10,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2022-11-22 00:40:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:40:10,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54912481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:40:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868282369] [2022-11-22 00:40:10,341 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-22 00:40:10,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:40:10,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:40:10,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:40:10,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:40:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:40:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:40:10,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,468 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:10,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,531 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:10,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,649 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:10,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,725 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:10,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:10,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,847 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:10,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:10,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:10,952 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:10,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:40:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,056 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 36 treesize of output 32 [2022-11-22 00:40:11,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:40:11,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:40:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:11,179 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 43 treesize of output 39 [2022-11-22 00:40:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:12,751 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-22 00:40:12,751 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 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-22 00:40:12,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:40:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:12,894 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 00:40:12,895 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-22 00:40:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:16,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:16,856 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:16,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:16,933 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:16,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:16,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:40:17,005 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:40:17,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:40:17,027 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-22 00:40:17,033 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:40:17,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:40:49,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16280#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= (+ |ULTIMATE.start_main_~#i~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#i~2#1.base|)) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#j~2#1.base|) 1) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem24#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem23#1| 4))) |ULTIMATE.start_main_#t~mem25#1|) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (= |ULTIMATE.start_finddup_#res#1| 1) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|)) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~#i~2#1.base|) 1) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= |ULTIMATE.start_main_~r~0#1| 1) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#j~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#j~2#1.base|)) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (<= 1 |ULTIMATE.start_main_~r~0#1|) (< (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|) |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| 4 (* |ULTIMATE.start_main_#t~mem23#1| 4)) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 1 |ULTIMATE.start_finddup_~n#1|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-22 00:40:49,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:40:49,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:40:49,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-11-22 00:40:49,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033112620] [2022-11-22 00:40:49,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:40:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 00:40:49,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:40:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 00:40:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4503, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 00:40:49,016 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-22 00:40:52,092 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] [2022-11-22 00:40:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:40:52,613 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-11-22 00:40:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 00:40:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 70 [2022-11-22 00:40:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:40:52,614 INFO L225 Difference]: With dead ends: 81 [2022-11-22 00:40:52,614 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 00:40:52,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=652, Invalid=5990, Unknown=0, NotChecked=0, Total=6642 [2022-11-22 00:40:52,615 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 307 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:40:52,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 264 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 00:40:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 00:40:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-22 00:40:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:40:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-11-22 00:40:52,618 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2022-11-22 00:40:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:40:52,618 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-11-22 00:40:52,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-22 00:40:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-11-22 00:40:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:40:52,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:40:52,619 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:40:52,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-22 00:40:52,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-22 00:40:52,825 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:40:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:40:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1090870049, now seen corresponding path program 1 times [2022-11-22 00:40:52,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:40:52,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242498539] [2022-11-22 00:40:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:40:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:41:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:41:09,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:41:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242498539] [2022-11-22 00:41:09,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242498539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:41:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678824108] [2022-11-22 00:41:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:41:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:41:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:41:09,234 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:41:09,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 00:41:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:41:09,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-22 00:41:09,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:41:09,596 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 6 treesize of output 5 [2022-11-22 00:41:09,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:41:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:41:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:41:11,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 00:41:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:41:11,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:41:11,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 39 [2022-11-22 00:41:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:41:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:41:14,856 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-22 00:41:14,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-11-22 00:41:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:41:15,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:41:18,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:41:18,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:41:18,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:41:18,233 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 6236 treesize of output 5752 [2022-11-22 00:41:18,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:41:18,293 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 9264 treesize of output 7880 [2022-11-22 00:41:18,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 00:41:19,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 5334 treesize of output 4822 [2022-11-22 00:41:27,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4881 treesize of output 4353 [2022-11-22 00:44:14,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:44:14,675 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 307 treesize of output 251 [2022-11-22 00:44:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:44:15,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678824108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:44:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452652208] [2022-11-22 00:44:15,191 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-22 00:44:15,191 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:44:15,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:44:15,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:44:15,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:44:15,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:44:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 00:44:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,371 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:15,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:15,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,443 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:15,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,560 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:15,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,647 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:15,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,806 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:15,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:15,905 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:15,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:16,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:16,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,020 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 36 treesize of output 32 [2022-11-22 00:44:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,109 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 43 treesize of output 39 [2022-11-22 00:44:16,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-22 00:44:17,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,878 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-22 00:44:17,879 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 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-22 00:44:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:18,046 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-22 00:44:18,047 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-22 00:44:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:22,611 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:22,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:22,683 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:22,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:22,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:22,755 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:44:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-22 00:44:22,782 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-22 00:44:22,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-22 00:44:22,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:45:08,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17000#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:45:08,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:45:08,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:45:08,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 21] total 60 [2022-11-22 00:45:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818227127] [2022-11-22 00:45:08,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:45:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-22 00:45:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:45:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-22 00:45:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=9512, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 00:45:08,669 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-22 00:45:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:45:43,366 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-22 00:45:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 00:45:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) Word has length 74 [2022-11-22 00:45:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:45:43,367 INFO L225 Difference]: With dead ends: 80 [2022-11-22 00:45:43,367 INFO L226 Difference]: Without dead ends: 80 [2022-11-22 00:45:43,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 147 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=1130, Invalid=14872, Unknown=0, NotChecked=0, Total=16002 [2022-11-22 00:45:43,369 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 480 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:45:43,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 300 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-22 00:45:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-22 00:45:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-11-22 00:45:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:45:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-11-22 00:45:43,373 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2022-11-22 00:45:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:45:43,373 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-11-22 00:45:43,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-22 00:45:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-11-22 00:45:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:45:43,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:45:43,375 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:45:43,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-22 00:45:43,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-22 00:45:43,582 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 00:45:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:45:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1985382166, now seen corresponding path program 1 times [2022-11-22 00:45:43,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:45:43,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459825491] [2022-11-22 00:45:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:45:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:45:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:45:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 00:45:45,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:45:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459825491] [2022-11-22 00:45:45,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459825491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:45:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877612615] [2022-11-22 00:45:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:45:45,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:45:45,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:45:45,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:45:45,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 00:45:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:45:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 00:45:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:45:45,723 INFO L321 Elim1Store]: treesize reduction 88, result has 24.8 percent of original size [2022-11-22 00:45:45,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 70 [2022-11-22 00:45:48,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 55 [2022-11-22 00:45:48,515 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#j~2#1.base_38| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_38| Int)) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#j~2#1.base_38|)) (.cse1 (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#i~2#1.base_38|))) (and (= .cse0 0) (= (select |c_#valid| |v_ULTIMATE.start_main_~#j~2#1.base_38|) 0) (not (= |ULTIMATE.start_main_~a~0#1.base| |v_ULTIMATE.start_main_~#i~2#1.base_38|)) (= (store (store (store (store (store (store |c_#valid| |ULTIMATE.start_main_~a~0#1.base| .cse1) |v_ULTIMATE.start_main_~#i~2#1.base_38| .cse2) |v_ULTIMATE.start_main_~#j~2#1.base_38| .cse0) |v_ULTIMATE.start_main_~#i~2#1.base_38| .cse2) |v_ULTIMATE.start_main_~#j~2#1.base_38| .cse0) |ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_old_#valid#1|) (= (select |c_#valid| |v_ULTIMATE.start_main_~#i~2#1.base_38|) 0) (= .cse1 0) (not (= |v_ULTIMATE.start_main_~#j~2#1.base_38| |v_ULTIMATE.start_main_~#i~2#1.base_38|)) (= (select |c_#valid| |ULTIMATE.start_main_~a~0#1.base|) 0) (= .cse2 0) (not (= |ULTIMATE.start_main_~a~0#1.base| |v_ULTIMATE.start_main_~#j~2#1.base_38|))))) is different from true [2022-11-22 00:45:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-22 00:45:48,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:45:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877612615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:45:48,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:45:48,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 20 [2022-11-22 00:45:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555449695] [2022-11-22 00:45:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:45:48,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:45:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:45:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:45:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2022-11-22 00:45:48,521 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:45:49,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:45:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:45:49,865 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-11-22 00:45:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:45:49,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2022-11-22 00:45:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:45:49,865 INFO L225 Difference]: With dead ends: 76 [2022-11-22 00:45:49,865 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 00:45:49,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=67, Invalid=356, Unknown=1, NotChecked=38, Total=462 [2022-11-22 00:45:49,866 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:45:49,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 1 Unknown, 55 Unchecked, 1.3s Time] [2022-11-22 00:45:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 00:45:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 00:45:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:45:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 00:45:49,867 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2022-11-22 00:45:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:45:49,867 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 00:45:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:45:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 00:45:49,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 00:45:49,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 37 remaining) [2022-11-22 00:45:49,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 37 remaining) [2022-11-22 00:45:49,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 37 remaining) [2022-11-22 00:45:49,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 37 remaining) [2022-11-22 00:45:49,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 37 remaining) [2022-11-22 00:45:49,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 37 remaining) [2022-11-22 00:45:49,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 37 remaining) [2022-11-22 00:45:49,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 37 remaining) [2022-11-22 00:45:49,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 37 remaining) [2022-11-22 00:45:49,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 37 remaining) [2022-11-22 00:45:49,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 37 remaining) [2022-11-22 00:45:49,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 37 remaining) [2022-11-22 00:45:49,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 37 remaining) [2022-11-22 00:45:49,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 37 remaining) [2022-11-22 00:45:49,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 37 remaining) [2022-11-22 00:45:49,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 37 remaining) [2022-11-22 00:45:49,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 37 remaining) [2022-11-22 00:45:49,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 37 remaining) [2022-11-22 00:45:49,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 37 remaining) [2022-11-22 00:45:49,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 37 remaining) [2022-11-22 00:45:49,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 37 remaining) [2022-11-22 00:45:49,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 37 remaining) [2022-11-22 00:45:49,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 37 remaining) [2022-11-22 00:45:49,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 37 remaining) [2022-11-22 00:45:49,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 37 remaining) [2022-11-22 00:45:49,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 37 remaining) [2022-11-22 00:45:49,876 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 37 remaining) [2022-11-22 00:45:49,876 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 37 remaining) [2022-11-22 00:45:49,876 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 37 remaining) [2022-11-22 00:45:49,876 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 37 remaining) [2022-11-22 00:45:49,876 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 37 remaining) [2022-11-22 00:45:49,876 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 37 remaining) [2022-11-22 00:45:49,877 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (4 of 37 remaining) [2022-11-22 00:45:49,877 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (3 of 37 remaining) [2022-11-22 00:45:49,877 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (2 of 37 remaining) [2022-11-22 00:45:49,877 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK (1 of 37 remaining) [2022-11-22 00:45:49,877 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 37 remaining) [2022-11-22 00:45:49,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 00:45:50,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-22 00:45:50,083 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:45:50,086 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 00:45:50,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:45:50 BoogieIcfgContainer [2022-11-22 00:45:50,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 00:45:50,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 00:45:50,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 00:45:50,090 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 00:45:50,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:33:00" (3/4) ... [2022-11-22 00:45:50,094 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 00:45:50,100 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-22 00:45:50,100 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-22 00:45:50,105 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2022-11-22 00:45:50,106 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-22 00:45:50,106 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-22 00:45:50,106 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 00:45:50,147 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 00:45:50,148 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 00:45:50,148 INFO L158 Benchmark]: Toolchain (without parser) took 770483.13ms. Allocated memory was 184.5MB in the beginning and 641.7MB in the end (delta: 457.2MB). Free memory was 138.2MB in the beginning and 208.5MB in the end (delta: -70.3MB). Peak memory consumption was 390.0MB. Max. memory is 16.1GB. [2022-11-22 00:45:50,148 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 184.5MB. Free memory is still 154.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:45:50,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.97ms. Allocated memory is still 184.5MB. Free memory was 137.9MB in the beginning and 127.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 00:45:50,149 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.27ms. Allocated memory is still 184.5MB. Free memory was 127.1MB in the beginning and 125.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:45:50,149 INFO L158 Benchmark]: Boogie Preprocessor took 28.58ms. Allocated memory is still 184.5MB. Free memory was 125.0MB in the beginning and 123.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:45:50,149 INFO L158 Benchmark]: RCFGBuilder took 717.58ms. Allocated memory is still 184.5MB. Free memory was 123.6MB in the beginning and 99.6MB in the end (delta: 24.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-22 00:45:50,149 INFO L158 Benchmark]: TraceAbstraction took 769227.49ms. Allocated memory was 184.5MB in the beginning and 641.7MB in the end (delta: 457.2MB). Free memory was 98.9MB in the beginning and 212.2MB in the end (delta: -113.3MB). Peak memory consumption was 346.0MB. Max. memory is 16.1GB. [2022-11-22 00:45:50,149 INFO L158 Benchmark]: Witness Printer took 58.35ms. Allocated memory is still 641.7MB. Free memory was 212.2MB in the beginning and 208.5MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-22 00:45:50,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 184.5MB. Free memory is still 154.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.97ms. Allocated memory is still 184.5MB. Free memory was 137.9MB in the beginning and 127.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.27ms. Allocated memory is still 184.5MB. Free memory was 127.1MB in the beginning and 125.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.58ms. Allocated memory is still 184.5MB. Free memory was 125.0MB in the beginning and 123.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 717.58ms. Allocated memory is still 184.5MB. Free memory was 123.6MB in the beginning and 99.6MB in the end (delta: 24.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 769227.49ms. Allocated memory was 184.5MB in the beginning and 641.7MB in the end (delta: 457.2MB). Free memory was 98.9MB in the beginning and 212.2MB in the end (delta: -113.3MB). Peak memory consumption was 346.0MB. Max. memory is 16.1GB. * Witness Printer took 58.35ms. Allocated memory is still 641.7MB. Free memory was 212.2MB in the beginning and 208.5MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 87 locations, 37 error locations. Started 1 CEGAR loops. OverallTime: 769.2s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 109.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 12498 SdHoareTripleChecker+Valid, 56.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12388 mSDsluCounter, 12796 SdHoareTripleChecker+Invalid, 53.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 55 IncrementalHoareTripleChecker+Unchecked, 10308 mSDsCounter, 2336 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18001 IncrementalHoareTripleChecker+Invalid, 20407 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2336 mSolverCounterUnsat, 2488 mSDtfsCounter, 18001 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2931 GetRequests, 1554 SyntacticMatches, 128 SemanticMatches, 1249 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28693 ImplicationChecksByTransitivity, 414.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=32, InterpolantAutomatonStates: 500, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 40 MinimizatonAttempts, 1882 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 269.4s InterpolantComputationTime, 2486 NumberOfCodeBlocks, 2469 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2999 ConstructedInterpolants, 228 QuantifiedInterpolants, 55274 SizeOfPredicates, 344 NumberOfNonLiveVariables, 5569 ConjunctsInSsa, 840 ConjunctsInUnsatCore, 77 InterpolantComputations, 22 PerfectInterpolantSequences, 1656/2114 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 4.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 43, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 21, TOOLS_POST_TIME: 0.7s, TOOLS_POST_CALL_APPLICATIONS: 36, TOOLS_POST_CALL_TIME: 2.3s, TOOLS_POST_RETURN_APPLICATIONS: 24, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 81, TOOLS_QUANTIFIERELIM_TIME: 3.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 104, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 45, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 43, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 24, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 472, DAG_COMPRESSION_RETAINED_NODES: 118, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 37 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 00:45:50,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017f8ca7-41a4-4434-9ded-4b90127c7da2/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE