./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS --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 eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 --- 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-8393723 [2022-11-19 08:36:12,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:36:12,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:36:12,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:36:12,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:36:12,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:36:12,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:36:12,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:36:12,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:36:12,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:36:12,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:36:12,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:36:12,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:36:12,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:36:12,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:36:12,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:36:12,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:36:12,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:36:12,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:36:12,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:36:12,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:36:12,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:36:12,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:36:12,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:36:12,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:36:12,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:36:12,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:36:12,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:36:12,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:36:12,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:36:12,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:36:12,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:36:12,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:36:12,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:36:12,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:36:12,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:36:12,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:36:12,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:36:12,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:36:12,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:36:12,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:36:12,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:36:12,899 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:36:12,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:36:12,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:36:12,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:36:12,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:36:12,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:36:12,901 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:36:12,902 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:36:12,902 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:36:12,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:36:12,903 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:36:12,904 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:36:12,904 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:36:12,904 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:36:12,904 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:36:12,905 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:36:12,905 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:36:12,905 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:36:12,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:36:12,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:36:12,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:36:12,909 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:36:12,909 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:36:12,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:36:12,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:36:12,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:36:12,910 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:36:12,910 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:36:12,910 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:36:12,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:36:12,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:36:12,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:36:12,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:36:12,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:36:12,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:36:12,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:36:12,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:36:12,913 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:36:12,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:36:12,913 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:36:12,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:36:12,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:36:12,914 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_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 [2022-11-19 08:36:13,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:36:13,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:36:13,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:36:13,180 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:36:13,181 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:36:13,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2022-11-19 08:36:13,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/data/e496583cd/eb7a76d39bbc413494ec008cd10c6339/FLAGce717e7ad [2022-11-19 08:36:13,653 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:36:13,653 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2022-11-19 08:36:13,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/data/e496583cd/eb7a76d39bbc413494ec008cd10c6339/FLAGce717e7ad [2022-11-19 08:36:14,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/data/e496583cd/eb7a76d39bbc413494ec008cd10c6339 [2022-11-19 08:36:14,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:36:14,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:36:14,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:36:14,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:36:14,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:36:14,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17333e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14, skipping insertion in model container [2022-11-19 08:36:14,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:36:14,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:36:14,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:36:14,371 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:36:14,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:36:14,407 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:36:14,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14 WrapperNode [2022-11-19 08:36:14,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:36:14,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:36:14,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:36:14,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:36:14,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,450 INFO L138 Inliner]: procedures = 8, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-11-19 08:36:14,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:36:14,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:36:14,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:36:14,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:36:14,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:36:14,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:36:14,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:36:14,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:36:14,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (1/1) ... [2022-11-19 08:36:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:36:14,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:14,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:36:14,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:36:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:36:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:36:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:36:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:36:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:36:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:36:14,627 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:36:14,628 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:36:14,791 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:36:14,856 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:36:14,857 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 08:36:14,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:14 BoogieIcfgContainer [2022-11-19 08:36:14,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:36:14,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:36:14,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:36:14,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:36:14,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:36:14" (1/3) ... [2022-11-19 08:36:14,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147b67a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:36:14, skipping insertion in model container [2022-11-19 08:36:14,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:14" (2/3) ... [2022-11-19 08:36:14,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147b67a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:36:14, skipping insertion in model container [2022-11-19 08:36:14,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:14" (3/3) ... [2022-11-19 08:36:14,869 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2022-11-19 08:36:14,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:36:14,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-19 08:36:14,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:36:14,942 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;@5466ce1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:36:14,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-19 08:36:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 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) [2022-11-19 08:36:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:36:14,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:14,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:36:14,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:14,966 INFO L85 PathProgramCache]: Analyzing trace with hash 3240188, now seen corresponding path program 1 times [2022-11-19 08:36:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:14,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946536825] [2022-11-19 08:36:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:15,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:15,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946536825] [2022-11-19 08:36:15,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946536825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:15,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:15,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:36:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381841298] [2022-11-19 08:36:15,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:15,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:15,257 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:15,325 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-19 08:36:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:36:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:15,336 INFO L225 Difference]: With dead ends: 37 [2022-11-19 08:36:15,336 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 08:36:15,338 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 [2022-11-19 08:36:15,341 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:15,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:36:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 08:36:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-11-19 08:36:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-11-19 08:36:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-19 08:36:15,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-19 08:36:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:15,386 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-19 08:36:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-19 08:36:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:36:15,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:15,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:36:15,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:36:15,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash 3168033, now seen corresponding path program 1 times [2022-11-19 08:36:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:15,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143922074] [2022-11-19 08:36:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:15,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143922074] [2022-11-19 08:36:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143922074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:15,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:15,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:36:15,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106482958] [2022-11-19 08:36:15,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:15,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:36:15,571 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:15,668 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-19 08:36:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:36:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:36:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:15,671 INFO L225 Difference]: With dead ends: 45 [2022-11-19 08:36:15,671 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 08:36:15,672 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 [2022-11-19 08:36:15,673 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:15,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 08:36:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2022-11-19 08:36:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-11-19 08:36:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-19 08:36:15,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2022-11-19 08:36:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:15,678 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-19 08:36:15,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-19 08:36:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:36:15,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:15,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:36:15,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:36:15,680 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash 3170125, now seen corresponding path program 1 times [2022-11-19 08:36:15,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:15,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854722112] [2022-11-19 08:36:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:15,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:15,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854722112] [2022-11-19 08:36:15,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854722112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:15,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:15,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:15,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009798007] [2022-11-19 08:36:15,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:15,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:15,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:15,795 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:15,831 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-19 08:36:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:36:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:15,833 INFO L225 Difference]: With dead ends: 19 [2022-11-19 08:36:15,833 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 08:36:15,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:15,835 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:15,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:36:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 08:36:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 08:36:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 18 states have internal predecessors, (22), 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) [2022-11-19 08:36:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-19 08:36:15,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2022-11-19 08:36:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:15,840 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-19 08:36:15,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-19 08:36:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:36:15,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:15,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:36:15,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:36:15,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 3170126, now seen corresponding path program 1 times [2022-11-19 08:36:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665457000] [2022-11-19 08:36:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:15,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665457000] [2022-11-19 08:36:15,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665457000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:15,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:15,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356473910] [2022-11-19 08:36:15,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:15,935 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:15,967 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-19 08:36:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:36:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:15,969 INFO L225 Difference]: With dead ends: 20 [2022-11-19 08:36:15,969 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 08:36:15,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:15,971 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:15,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:36:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 08:36:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 08:36:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-11-19 08:36:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-19 08:36:15,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-19 08:36:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:15,976 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-19 08:36:15,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-19 08:36:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-19 08:36:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:15,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:15,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:36:15,977 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -46754049, now seen corresponding path program 1 times [2022-11-19 08:36:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476791499] [2022-11-19 08:36:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:16,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476791499] [2022-11-19 08:36:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476791499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109618722] [2022-11-19 08:36:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:16,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:16,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:16,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:16,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:36:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:36:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:16,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:16,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109618722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:16,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477612377] [2022-11-19 08:36:16,253 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:16,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:16,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:16,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:16,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:16,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:16,401 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 15 treesize of output 11 [2022-11-19 08:36:16,699 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:16,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 174 [2022-11-19 08:36:17,378 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:17,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 174 [2022-11-19 08:36:17,480 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:18,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1477612377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:18,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:18,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-11-19 08:36:18,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701339045] [2022-11-19 08:36:18,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:18,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:36:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:36:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:36:18,403 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-19 08:36:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:18,747 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-19 08:36:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:36:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:18,748 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:36:18,748 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:36:18,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:36:18,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:18,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:36:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-19 08:36:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-11-19 08:36:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-19 08:36:18,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2022-11-19 08:36:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:18,753 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-19 08:36:18,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-19 08:36:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-19 08:36:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:18,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:18,759 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-19 08:36:18,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:36:18,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:18,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:18,965 INFO L85 PathProgramCache]: Analyzing trace with hash -46825228, now seen corresponding path program 1 times [2022-11-19 08:36:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:18,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914029240] [2022-11-19 08:36:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:19,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914029240] [2022-11-19 08:36:19,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914029240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:19,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894454795] [2022-11-19 08:36:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:19,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:19,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:19,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:19,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:36:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:36:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894454795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866083368] [2022-11-19 08:36:19,335 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 08:36:19,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:19,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:19,336 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:19,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:19,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:19,397 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 15 treesize of output 11 [2022-11-19 08:36:19,525 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 201 treesize of output 191 [2022-11-19 08:36:19,917 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 201 treesize of output 191 [2022-11-19 08:36:19,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:21,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1866083368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:21,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:21,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2022-11-19 08:36:21,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854289731] [2022-11-19 08:36:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:21,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:36:21,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:36:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:36:21,093 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:21,197 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-19 08:36:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:36:21,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:21,199 INFO L225 Difference]: With dead ends: 24 [2022-11-19 08:36:21,199 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 08:36:21,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:36:21,200 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:21,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 08:36:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-19 08:36:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-11-19 08:36:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-19 08:36:21,203 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2022-11-19 08:36:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:21,203 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-19 08:36:21,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-19 08:36:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:36:21,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:21,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:21,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:21,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:36:21,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash 894109178, now seen corresponding path program 1 times [2022-11-19 08:36:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042740354] [2022-11-19 08:36:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:21,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:21,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042740354] [2022-11-19 08:36:21,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042740354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:21,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776779842] [2022-11-19 08:36:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:21,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:21,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:21,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:21,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:36:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:36:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:21,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776779842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636231386] [2022-11-19 08:36:21,717 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:21,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:21,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:21,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:21,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:21,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:21,767 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:21,789 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 [2022-11-19 08:36:21,934 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 17 treesize of output 16 [2022-11-19 08:36:22,044 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:22,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:22,375 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 17 treesize of output 16 [2022-11-19 08:36:22,397 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 16 treesize of output 12 [2022-11-19 08:36:22,452 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 16 treesize of output 12 [2022-11-19 08:36:22,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:23,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '497#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296))) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:23,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:23,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:23,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-19 08:36:23,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733340608] [2022-11-19 08:36:23,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:23,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:36:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:23,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:36:23,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:36:23,178 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-11-19 08:36:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:23,415 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-19 08:36:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:36:23,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:36:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:23,418 INFO L225 Difference]: With dead ends: 64 [2022-11-19 08:36:23,418 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 08:36:23,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:36:23,420 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 149 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:23,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 25 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 08:36:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2022-11-19 08:36:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-19 08:36:23,425 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2022-11-19 08:36:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:23,425 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-19 08:36:23,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-11-19 08:36:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-19 08:36:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:36:23,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:23,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:23,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:23,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:23,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash 894111271, now seen corresponding path program 1 times [2022-11-19 08:36:23,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666337370] [2022-11-19 08:36:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:23,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:23,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666337370] [2022-11-19 08:36:23,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666337370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242076602] [2022-11-19 08:36:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:23,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:23,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:23,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:36:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:36:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:23,840 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 [2022-11-19 08:36:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:23,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:23,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242076602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729916124] [2022-11-19 08:36:23,978 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:23,978 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:23,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:23,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:23,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:23,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:24,012 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:24,035 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 15 treesize of output 11 [2022-11-19 08:36:24,195 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 17 treesize of output 16 [2022-11-19 08:36:24,281 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:24,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:24,603 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 17 treesize of output 16 [2022-11-19 08:36:24,623 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 16 treesize of output 12 [2022-11-19 08:36:24,680 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 16 treesize of output 12 [2022-11-19 08:36:24,693 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:25,442 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '679#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|)) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:25,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:25,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:25,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-19 08:36:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183917071] [2022-11-19 08:36:25,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:25,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:36:25,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:36:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:36:25,444 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:25,584 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-19 08:36:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:36:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:36:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:25,585 INFO L225 Difference]: With dead ends: 54 [2022-11-19 08:36:25,585 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 08:36:25,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:36:25,587 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:25,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 08:36:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-11-19 08:36:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 48 states have internal predecessors, (62), 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) [2022-11-19 08:36:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-11-19 08:36:25,592 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2022-11-19 08:36:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:25,592 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-11-19 08:36:25,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-11-19 08:36:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:36:25,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:25,593 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 08:36:25,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:25,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:25,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash -917063813, now seen corresponding path program 2 times [2022-11-19 08:36:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:25,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537969138] [2022-11-19 08:36:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:25,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:25,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:25,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537969138] [2022-11-19 08:36:25,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537969138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545564653] [2022-11-19 08:36:25,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:25,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:25,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:36:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:36:25,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:36:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:36:26,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:26,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545564653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:26,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:36:26,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-11-19 08:36:26,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287307158] [2022-11-19 08:36:26,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:26,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:26,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:26,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:36:26,028 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-19 08:36:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:26,086 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-11-19 08:36:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:36:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:26,089 INFO L225 Difference]: With dead ends: 76 [2022-11-19 08:36:26,089 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 08:36:26,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:26,092 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:26,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:36:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 08:36:26,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2022-11-19 08:36:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 52 states have internal predecessors, (68), 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) [2022-11-19 08:36:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-19 08:36:26,107 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 13 [2022-11-19 08:36:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:26,108 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-19 08:36:26,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-19 08:36:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-19 08:36:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:36:26,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:26,109 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 08:36:26,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:26,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:26,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash 332416397, now seen corresponding path program 3 times [2022-11-19 08:36:26,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:26,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129744679] [2022-11-19 08:36:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:36:26,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129744679] [2022-11-19 08:36:26,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129744679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885695359] [2022-11-19 08:36:26,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:36:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:26,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:26,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:36:26,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:36:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:36:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:36:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:36:26,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885695359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:26,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628468253] [2022-11-19 08:36:26,515 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:26,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:26,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:26,516 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:26,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:26,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:26,549 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:26,567 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 15 treesize of output 11 [2022-11-19 08:36:26,729 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 17 treesize of output 16 [2022-11-19 08:36:26,804 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:26,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:27,100 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 17 treesize of output 16 [2022-11-19 08:36:27,116 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 16 treesize of output 12 [2022-11-19 08:36:27,158 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 16 treesize of output 12 [2022-11-19 08:36:27,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:27,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1048#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296))) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:27,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:27,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:27,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 08:36:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142806073] [2022-11-19 08:36:27,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:27,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:36:27,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:36:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:36:27,858 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-11-19 08:36:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:27,956 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-11-19 08:36:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:36:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:36:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:27,957 INFO L225 Difference]: With dead ends: 49 [2022-11-19 08:36:27,957 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 08:36:27,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:36:27,958 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:27,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 11 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 08:36:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-11-19 08:36:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.358974358974359) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-11-19 08:36:27,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 13 [2022-11-19 08:36:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:27,962 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-11-19 08:36:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-11-19 08:36:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-11-19 08:36:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:36:27,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:27,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2022-11-19 08:36:27,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:28,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:36:28,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792922, now seen corresponding path program 1 times [2022-11-19 08:36:28,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686774712] [2022-11-19 08:36:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:28,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:28,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686774712] [2022-11-19 08:36:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686774712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124349351] [2022-11-19 08:36:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:28,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:28,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:28,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:36:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:28,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:36:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:28,362 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 08:36:28,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-19 08:36:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:28,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124349351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269784571] [2022-11-19 08:36:28,372 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:28,372 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:28,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:28,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:28,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:28,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:28,409 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:28,432 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 [2022-11-19 08:36:28,568 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 17 treesize of output 16 [2022-11-19 08:36:28,652 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:28,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:28,946 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 17 treesize of output 16 [2022-11-19 08:36:28,968 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 16 treesize of output 12 [2022-11-19 08:36:29,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:36:29,027 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:29,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1231#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (not (= (select |#valid| |ULTIMATE.start_foo_~b#1.base|) 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:29,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:29,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:29,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-19 08:36:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599239366] [2022-11-19 08:36:29,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:29,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:36:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:36:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:36:29,716 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-19 08:36:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:29,759 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-11-19 08:36:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:36:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:29,761 INFO L225 Difference]: With dead ends: 42 [2022-11-19 08:36:29,761 INFO L226 Difference]: Without dead ends: 42 [2022-11-19 08:36:29,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:36:29,763 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:29,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:36:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-19 08:36:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-19 08:36:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-19 08:36:29,770 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 14 [2022-11-19 08:36:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:29,771 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-19 08:36:29,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-19 08:36:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-19 08:36:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:36:29,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:29,772 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2022-11-19 08:36:29,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:36:29,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:29,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792923, now seen corresponding path program 1 times [2022-11-19 08:36:29,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:29,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392090639] [2022-11-19 08:36:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:36:30,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392090639] [2022-11-19 08:36:30,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392090639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845734959] [2022-11-19 08:36:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:30,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:30,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:36:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:30,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:36:30,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:30,167 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 [2022-11-19 08:36:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:36:30,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:36:30,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845734959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341944633] [2022-11-19 08:36:30,312 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:30,312 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:30,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:30,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:30,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:30,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:30,344 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:30,362 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 [2022-11-19 08:36:30,493 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 17 treesize of output 16 [2022-11-19 08:36:30,564 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:30,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:30,852 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 17 treesize of output 16 [2022-11-19 08:36:30,876 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 16 treesize of output 12 [2022-11-19 08:36:30,924 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 16 treesize of output 12 [2022-11-19 08:36:30,945 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:31,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1410#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (not (<= (+ 4 (* |ULTIMATE.start_foo_~i~0#1| 4) |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:31,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:31,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:31,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-19 08:36:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646784639] [2022-11-19 08:36:31,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:36:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:36:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:36:31,643 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-11-19 08:36:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:31,731 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-11-19 08:36:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:36:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:36:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:31,732 INFO L225 Difference]: With dead ends: 70 [2022-11-19 08:36:31,732 INFO L226 Difference]: Without dead ends: 70 [2022-11-19 08:36:31,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:36:31,732 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:31,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-19 08:36:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2022-11-19 08:36:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2022-11-19 08:36:31,735 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 14 [2022-11-19 08:36:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:31,736 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2022-11-19 08:36:31,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-11-19 08:36:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2022-11-19 08:36:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:36:31,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:31,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2022-11-19 08:36:31,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:31,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:36:31,942 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash 39022099, now seen corresponding path program 4 times [2022-11-19 08:36:31,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:31,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539414872] [2022-11-19 08:36:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:31,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:32,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539414872] [2022-11-19 08:36:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539414872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116466022] [2022-11-19 08:36:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:36:32,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:32,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:32,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:32,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:36:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:36:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:32,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:32,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116466022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:32,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373733407] [2022-11-19 08:36:32,468 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:32,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:32,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:32,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:32,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:32,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:32,499 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:32,527 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 15 treesize of output 11 [2022-11-19 08:36:32,642 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 17 treesize of output 16 [2022-11-19 08:36:32,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 215 [2022-11-19 08:36:33,050 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 17 treesize of output 16 [2022-11-19 08:36:33,074 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 16 treesize of output 12 [2022-11-19 08:36:33,125 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 16 treesize of output 12 [2022-11-19 08:36:33,151 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:33,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1645#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296))) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:33,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:33,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:33,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2022-11-19 08:36:33,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50193797] [2022-11-19 08:36:33,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:33,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:36:33,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:33,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:36:33,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:36:33,739 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:34,998 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2022-11-19 08:36:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 08:36:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:36:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:34,999 INFO L225 Difference]: With dead ends: 163 [2022-11-19 08:36:34,999 INFO L226 Difference]: Without dead ends: 163 [2022-11-19 08:36:35,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:36:35,000 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:35,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 31 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:36:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-19 08:36:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2022-11-19 08:36:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.379746835443038) internal successors, (109), 81 states have internal predecessors, (109), 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) [2022-11-19 08:36:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2022-11-19 08:36:35,005 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 16 [2022-11-19 08:36:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:35,006 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2022-11-19 08:36:35,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2022-11-19 08:36:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:36:35,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:35,006 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1] [2022-11-19 08:36:35,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:36:35,215 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1428680581, now seen corresponding path program 5 times [2022-11-19 08:36:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:35,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875816247] [2022-11-19 08:36:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:35,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:35,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875816247] [2022-11-19 08:36:35,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875816247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:35,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146836803] [2022-11-19 08:36:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:35,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:35,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:36:35,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:36:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:36:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:36:35,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:36:35,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146836803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900600413] [2022-11-19 08:36:35,803 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:35,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:35,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:35,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:35,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:35,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:35,839 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:35,857 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 [2022-11-19 08:36:36,002 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 17 treesize of output 16 [2022-11-19 08:36:36,084 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:36,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:36,363 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 17 treesize of output 16 [2022-11-19 08:36:36,386 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 16 treesize of output 12 [2022-11-19 08:36:36,430 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 16 treesize of output 12 [2022-11-19 08:36:36,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:37,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2064#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296))) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:37,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:37,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:37,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2022-11-19 08:36:37,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821377521] [2022-11-19 08:36:37,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:37,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:36:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:36:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:36:37,171 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:37,801 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2022-11-19 08:36:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 08:36:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:36:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:37,802 INFO L225 Difference]: With dead ends: 80 [2022-11-19 08:36:37,802 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 08:36:37,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:36:37,804 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 189 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:37,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 7 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 08:36:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2022-11-19 08:36:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 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) [2022-11-19 08:36:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-19 08:36:37,807 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2022-11-19 08:36:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:37,808 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-19 08:36:37,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-19 08:36:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:36:37,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:37,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1] [2022-11-19 08:36:37,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:38,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:36:38,014 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886260, now seen corresponding path program 2 times [2022-11-19 08:36:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:38,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311561503] [2022-11-19 08:36:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:38,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:36:38,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311561503] [2022-11-19 08:36:38,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311561503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:38,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268270781] [2022-11-19 08:36:38,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:38,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:38,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:38,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:38,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:36:38,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:36:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:36:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:38,221 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 [2022-11-19 08:36:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:36:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:36:38,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268270781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918521866] [2022-11-19 08:36:38,556 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:36:38,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:38,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:38,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:38,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:38,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:38,591 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:38,611 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 16 treesize of output 12 [2022-11-19 08:36:38,717 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 17 treesize of output 16 [2022-11-19 08:36:38,803 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 211 treesize of output 210 [2022-11-19 08:36:39,100 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 17 treesize of output 16 [2022-11-19 08:36:39,138 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 16 treesize of output 12 [2022-11-19 08:36:39,187 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 16 treesize of output 12 [2022-11-19 08:36:39,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:39,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2404#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (not (<= (+ 4 (* |ULTIMATE.start_foo_~i~0#1| 4) |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:39,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:39,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:39,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-19 08:36:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923566538] [2022-11-19 08:36:39,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:39,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:36:39,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:36:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:36:39,845 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:40,449 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-19 08:36:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:36:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:36:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:40,450 INFO L225 Difference]: With dead ends: 50 [2022-11-19 08:36:40,450 INFO L226 Difference]: Without dead ends: 50 [2022-11-19 08:36:40,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:36:40,451 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:40,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 20 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-19 08:36:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-11-19 08:36:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 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) [2022-11-19 08:36:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-19 08:36:40,454 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2022-11-19 08:36:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:40,454 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-19 08:36:40,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-19 08:36:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:36:40,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:40,455 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:40,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash -834078593, now seen corresponding path program 1 times [2022-11-19 08:36:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:40,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195659956] [2022-11-19 08:36:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:40,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:36:40,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195659956] [2022-11-19 08:36:40,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195659956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214383105] [2022-11-19 08:36:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:40,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:40,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:40,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:36:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:36:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:36:41,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:36:41,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214383105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:41,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796191029] [2022-11-19 08:36:41,133 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 08:36:41,134 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:41,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:41,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:41,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:41,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:41,167 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:41,186 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 15 treesize of output 11 [2022-11-19 08:36:41,292 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 17 treesize of output 16 [2022-11-19 08:36:41,397 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:41,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:41,675 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 17 treesize of output 16 [2022-11-19 08:36:41,693 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 16 treesize of output 12 [2022-11-19 08:36:41,739 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 16 treesize of output 12 [2022-11-19 08:36:41,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:36:41,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:43,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2739#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~i~0#1| 2147483647) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_28| Int) (|v_ULTIMATE.start_main_~i~1#1_114| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_28|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (* |ULTIMATE.start_main_~i~1#1| 4)) |ULTIMATE.start_main_~i~1#1|)) (<= (* 4 |v_ULTIMATE.start_main_~i~1#1_114|) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_28|)) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_28|)) (<= 4 (* 4 |v_ULTIMATE.start_main_~i~1#1_114|)) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_28|) 0) (<= 100 |v_ULTIMATE.start_main_~i~1#1_114|) (= |ULTIMATE.start_foo_#res#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (+ (- 4) (* 4 |v_ULTIMATE.start_main_~i~1#1_114|)))))) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:43,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:43,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:43,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-11-19 08:36:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045963062] [2022-11-19 08:36:43,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:43,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:36:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:36:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:36:43,113 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:43,584 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-11-19 08:36:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 08:36:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-19 08:36:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:43,585 INFO L225 Difference]: With dead ends: 91 [2022-11-19 08:36:43,585 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 08:36:43,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:36:43,587 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 253 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:43,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 27 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 08:36:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2022-11-19 08:36:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 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) [2022-11-19 08:36:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-11-19 08:36:43,590 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 33 [2022-11-19 08:36:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:43,590 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-11-19 08:36:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-11-19 08:36:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 08:36:43,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:43,591 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:43,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:36:43,792 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 235722060, now seen corresponding path program 2 times [2022-11-19 08:36:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:43,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691612052] [2022-11-19 08:36:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:36:43,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691612052] [2022-11-19 08:36:43,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691612052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413311430] [2022-11-19 08:36:43,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:43,994 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:44,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:36:44,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:36:44,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:44,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:44,300 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_29| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_29| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 0))) is different from true [2022-11-19 08:36:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-19 08:36:44,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:44,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413311430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:44,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:36:44,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2022-11-19 08:36:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552667971] [2022-11-19 08:36:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:44,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:44,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=43, Unknown=1, NotChecked=14, Total=90 [2022-11-19 08:36:44,303 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:44,307 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-11-19 08:36:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-19 08:36:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:44,308 INFO L225 Difference]: With dead ends: 63 [2022-11-19 08:36:44,309 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 08:36:44,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=43, Unknown=1, NotChecked=14, Total=90 [2022-11-19 08:36:44,309 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:44,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-11-19 08:36:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 08:36:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-19 08:36:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 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) [2022-11-19 08:36:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-11-19 08:36:44,312 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 48 [2022-11-19 08:36:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:44,313 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-11-19 08:36:44,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-11-19 08:36:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 08:36:44,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:44,315 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 08:36:44,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:44,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:36:44,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 122028562, now seen corresponding path program 1 times [2022-11-19 08:36:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:44,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014191727] [2022-11-19 08:36:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:44,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:36:44,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014191727] [2022-11-19 08:36:44,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014191727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789748323] [2022-11-19 08:36:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:44,703 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:44,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:36:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:36:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:36:44,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:36:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789748323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816105244] [2022-11-19 08:36:45,135 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 08:36:45,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:45,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:45,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:45,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:45,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:45,173 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:45,192 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 16 treesize of output 12 [2022-11-19 08:36:45,333 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 17 treesize of output 16 [2022-11-19 08:36:45,409 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 225 treesize of output 215 [2022-11-19 08:36:45,718 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 17 treesize of output 16 [2022-11-19 08:36:45,736 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 16 treesize of output 12 [2022-11-19 08:36:45,797 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 16 treesize of output 12 [2022-11-19 08:36:45,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:36:45,880 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:46,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3536#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 (* |ULTIMATE.start_main_~i~1#1| 4)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_30| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_30|) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_30|)) (not (= |ULTIMATE.start_main_~i~1#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_30|) (* |ULTIMATE.start_main_~i~1#1| 4)))))) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:46,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:46,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:46,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-11-19 08:36:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886646305] [2022-11-19 08:36:46,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:36:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:36:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:36:46,672 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 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) [2022-11-19 08:36:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:47,389 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-11-19 08:36:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 08:36:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-19 08:36:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:47,390 INFO L225 Difference]: With dead ends: 115 [2022-11-19 08:36:47,391 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 08:36:47,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=519, Invalid=2561, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 08:36:47,392 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 235 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:47,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:36:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 08:36:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2022-11-19 08:36:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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) [2022-11-19 08:36:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2022-11-19 08:36:47,395 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 51 [2022-11-19 08:36:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:47,396 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2022-11-19 08:36:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 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) [2022-11-19 08:36:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2022-11-19 08:36:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:36:47,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:47,398 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 08:36:47,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:36:47,604 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 352614233, now seen corresponding path program 2 times [2022-11-19 08:36:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089999409] [2022-11-19 08:36:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:47,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:36:47,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089999409] [2022-11-19 08:36:47,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089999409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:47,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629632800] [2022-11-19 08:36:47,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:47,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:47,830 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:47,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:36:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:36:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:48,231 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_31|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_31| 0)))) is different from true [2022-11-19 08:36:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-11-19 08:36:48,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:48,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629632800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:48,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:36:48,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-19 08:36:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517434426] [2022-11-19 08:36:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:48,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:48,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-11-19 08:36:48,234 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-19 08:36:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:48,237 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-11-19 08:36:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 08:36:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:48,238 INFO L225 Difference]: With dead ends: 84 [2022-11-19 08:36:48,238 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 08:36:48,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-11-19 08:36:48,239 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:48,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-11-19 08:36:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 08:36:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-19 08:36:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 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) [2022-11-19 08:36:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-11-19 08:36:48,241 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 69 [2022-11-19 08:36:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:48,242 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-11-19 08:36:48,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-19 08:36:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-11-19 08:36:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:36:48,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:48,244 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2022-11-19 08:36:48,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:48,453 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 260105500, now seen corresponding path program 1 times [2022-11-19 08:36:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:48,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229567764] [2022-11-19 08:36:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-19 08:36:48,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229567764] [2022-11-19 08:36:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229567764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555263202] [2022-11-19 08:36:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:48,728 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:48,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:36:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:36:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 191 proven. 177 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 08:36:49,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 191 proven. 177 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 08:36:49,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555263202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102563946] [2022-11-19 08:36:49,312 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 08:36:49,312 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:49,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:49,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:49,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:49,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:36:49,345 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:36:49,365 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 [2022-11-19 08:36:49,454 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 17 treesize of output 16 [2022-11-19 08:36:49,503 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-19 08:36:49,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 198 [2022-11-19 08:36:49,764 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 17 treesize of output 16 [2022-11-19 08:36:49,782 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 16 treesize of output 12 [2022-11-19 08:36:49,822 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:36:50,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:36:50,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:51,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4688#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= |ULTIMATE.start_foo_#res#1| 2147483647) (<= 0 |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_foo_~size#1| 2147483647) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~i~0#1| 2147483647) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~1#1| 100)) (<= 0 |ULTIMATE.start_foo_~n#1|) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0) (<= (* |ULTIMATE.start_main_~i~1#1| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_32|)) (= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_32|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) (- 4))) 1) |ULTIMATE.start_main_~i~1#1|) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_32|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |ULTIMATE.start_main_#res#1| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:36:51,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:36:51,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:51,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 25 [2022-11-19 08:36:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19145488] [2022-11-19 08:36:51,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:51,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:36:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:36:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:36:51,645 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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) [2022-11-19 08:36:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:52,650 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2022-11-19 08:36:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 08:36:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-19 08:36:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:52,652 INFO L225 Difference]: With dead ends: 132 [2022-11-19 08:36:52,652 INFO L226 Difference]: Without dead ends: 132 [2022-11-19 08:36:52,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 220 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=753, Invalid=3939, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 08:36:52,654 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 353 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:52,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 9 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:36:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-19 08:36:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2022-11-19 08:36:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0566037735849056) internal successors, (112), 106 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2022-11-19 08:36:52,657 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 82 [2022-11-19 08:36:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:52,657 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2022-11-19 08:36:52,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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) [2022-11-19 08:36:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2022-11-19 08:36:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:36:52,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:52,662 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-19 08:36:52,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:52,868 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-19 08:36:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -34921937, now seen corresponding path program 2 times [2022-11-19 08:36:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553859310] [2022-11-19 08:36:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-11-19 08:36:53,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:53,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553859310] [2022-11-19 08:36:53,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553859310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:53,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432992203] [2022-11-19 08:36:53,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:53,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:53,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:53,159 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:53,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:36:53,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:36:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:53,635 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| 0)))) is different from true [2022-11-19 08:36:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2022-11-19 08:36:53,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:53,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432992203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:53,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:36:53,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2022-11-19 08:36:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949082999] [2022-11-19 08:36:53,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:53,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=64, Unknown=1, NotChecked=18, Total=132 [2022-11-19 08:36:53,638 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-19 08:36:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:53,641 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-11-19 08:36:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-11-19 08:36:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:53,642 INFO L225 Difference]: With dead ends: 106 [2022-11-19 08:36:53,642 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:36:53,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=64, Unknown=1, NotChecked=18, Total=132 [2022-11-19 08:36:53,643 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:53,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-19 08:36:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:36:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:36:53,644 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) [2022-11-19 08:36:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:36:53,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2022-11-19 08:36:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:53,644 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:36:53,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-19 08:36:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:36:53,645 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:36:53,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-11-19 08:36:53,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-11-19 08:36:53,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-11-19 08:36:53,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-19 08:36:53,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-19 08:36:53,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-11-19 08:36:53,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-11-19 08:36:53,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-19 08:36:53,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:53,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:53,857 INFO L444 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:53,859 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:36:53,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:36:53 BoogieIcfgContainer [2022-11-19 08:36:53,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:36:53,865 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:36:53,865 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:36:53,865 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:36:53,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:14" (3/4) ... [2022-11-19 08:36:53,869 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 08:36:53,877 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-19 08:36:53,877 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-19 08:36:53,878 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-19 08:36:53,878 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 08:36:53,919 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:36:53,919 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:36:53,920 INFO L158 Benchmark]: Toolchain (without parser) took 39839.87ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 86.3MB in the beginning and 299.7MB in the end (delta: -213.4MB). Peak memory consumption was 176.4MB. Max. memory is 16.1GB. [2022-11-19 08:36:53,925 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:36:53,925 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.23ms. Allocated memory is still 130.0MB. Free memory was 86.1MB in the beginning and 103.3MB in the end (delta: -17.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:36:53,926 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.69ms. Allocated memory is still 130.0MB. Free memory was 103.3MB in the beginning and 101.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:36:53,926 INFO L158 Benchmark]: Boogie Preprocessor took 36.38ms. Allocated memory is still 130.0MB. Free memory was 101.7MB in the beginning and 100.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:36:53,927 INFO L158 Benchmark]: RCFGBuilder took 370.42ms. Allocated memory is still 130.0MB. Free memory was 100.6MB in the beginning and 86.6MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 08:36:53,928 INFO L158 Benchmark]: TraceAbstraction took 39001.44ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 86.0MB in the beginning and 111.0MB in the end (delta: -25.1MB). Peak memory consumption was 175.2MB. Max. memory is 16.1GB. [2022-11-19 08:36:53,928 INFO L158 Benchmark]: Witness Printer took 54.59ms. Allocated memory is still 327.2MB. Free memory was 111.0MB in the beginning and 299.7MB in the end (delta: -188.7MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2022-11-19 08:36:53,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.23ms. Allocated memory is still 130.0MB. Free memory was 86.1MB in the beginning and 103.3MB in the end (delta: -17.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.69ms. Allocated memory is still 130.0MB. Free memory was 103.3MB in the beginning and 101.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.38ms. Allocated memory is still 130.0MB. Free memory was 101.7MB in the beginning and 100.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 370.42ms. Allocated memory is still 130.0MB. Free memory was 100.6MB in the beginning and 86.6MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 39001.44ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 86.0MB in the beginning and 111.0MB in the end (delta: -25.1MB). Peak memory consumption was 175.2MB. Max. memory is 16.1GB. * Witness Printer took 54.59ms. Allocated memory is still 327.2MB. Free memory was 111.0MB in the beginning and 299.7MB in the end (delta: -188.7MB). Peak memory consumption was 3.2MB. 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: 15]: array index is always in bounds For all program executions holds that array index is always in bounds 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: 20]: 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 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 38.9s, OverallIterations: 21, TraceHistogramMax: 20, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1752 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1752 mSDsluCounter, 308 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 43 IncrementalHoareTripleChecker+Unchecked, 206 mSDsCounter, 286 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2495 IncrementalHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 286 mSolverCounterUnsat, 102 mSDtfsCounter, 2495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1373 GetRequests, 937 SyntacticMatches, 24 SemanticMatches, 412 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=20, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 332 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1092 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1343 ConstructedInterpolants, 220 QuantifiedInterpolants, 7717 SizeOfPredicates, 60 NumberOfNonLiveVariables, 2248 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 51 InterpolantComputations, 8 PerfectInterpolantSequences, 3836/5539 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: 1.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 23, TOOLS_POST_TIME: 1.7s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 23, TOOLS_QUANTIFIERELIM_TIME: 1.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.5s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 1.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, 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: 101, DAG_COMPRESSION_RETAINED_NODES: 44, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-19 08:36:53,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd078c1-d99c-4847-a699-4f2c33f0063f/bin/utaipan-I9t0OCRTmS/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