./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 09:47:04,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:47:04,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:47:04,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:47:04,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:47:04,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:47:04,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:47:04,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:47:04,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:47:04,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:47:04,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:47:04,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:47:04,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:47:04,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:47:04,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:47:04,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:47:04,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:47:04,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:47:04,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:47:04,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:47:04,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:47:04,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:47:04,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:47:04,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:47:04,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:47:04,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:47:04,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:47:04,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:47:04,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:47:04,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:47:04,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:47:04,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:47:04,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:47:04,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:47:04,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:47:04,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:47:04,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:47:04,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:47:04,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:47:04,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:47:04,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:47:04,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:47:04,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:47:04,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:47:04,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:47:04,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:47:04,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:47:04,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:47:04,866 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:47:04,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:47:04,871 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:47:04,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:47:04,872 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:47:04,872 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:47:04,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:47:04,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:47:04,872 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:47:04,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:47:04,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:47:04,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:47:04,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:47:04,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:47:04,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:47:04,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:47:04,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:47:04,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:47:04,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:47:04,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:47:04,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:47:04,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:47:04,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:47:04,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:47:04,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:47:04,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:47:04,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:47:04,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:47:04,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:47:04,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:47:04,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:47:04,877 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:47:04,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:47:04,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:47:04,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:47:04,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:47:04,877 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_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 [2022-12-14 09:47:05,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:47:05,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:47:05,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:47:05,059 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:47:05,059 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:47:05,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2022-12-14 09:47:07,704 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:47:07,834 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:47:07,835 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2022-12-14 09:47:07,839 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/data/7e91b8265/f7184100c1d24eccbb573ce186363113/FLAG369a53083 [2022-12-14 09:47:07,849 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/data/7e91b8265/f7184100c1d24eccbb573ce186363113 [2022-12-14 09:47:07,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:47:07,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:47:07,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:47:07,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:47:07,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:47:07,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:47:07" (1/1) ... [2022-12-14 09:47:07,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407e56e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:07, skipping insertion in model container [2022-12-14 09:47:07,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:47:07" (1/1) ... [2022-12-14 09:47:07,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:47:07,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:47:07,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:47:07,997 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:47:08,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:47:08,020 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:47:08,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08 WrapperNode [2022-12-14 09:47:08,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:47:08,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:47:08,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:47:08,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:47:08,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,046 INFO L138 Inliner]: procedures = 8, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-12-14 09:47:08,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:47:08,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:47:08,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:47:08,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:47:08,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:47:08,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:47:08,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:47:08,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:47:08,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (1/1) ... [2022-12-14 09:47:08,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:47:08,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:08,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:47:08,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:47:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:47:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:47:08,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:47:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:47:08,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:47:08,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:47:08,186 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:47:08,187 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:47:08,324 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:47:08,383 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:47:08,383 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 09:47:08,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:47:08 BoogieIcfgContainer [2022-12-14 09:47:08,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:47:08,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:47:08,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:47:08,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:47:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:47:07" (1/3) ... [2022-12-14 09:47:08,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303cac98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:47:08, skipping insertion in model container [2022-12-14 09:47:08,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:47:08" (2/3) ... [2022-12-14 09:47:08,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303cac98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:47:08, skipping insertion in model container [2022-12-14 09:47:08,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:47:08" (3/3) ... [2022-12-14 09:47:08,396 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2022-12-14 09:47:08,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:47:08,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-12-14 09:47:08,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:47:08,465 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;@70945d15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:47:08,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-14 09:47:08,469 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) [2022-12-14 09:47:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:47:08,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:08,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:47:08,476 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)] === [2022-12-14 09:47:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 3240188, now seen corresponding path program 1 times [2022-12-14 09:47:08,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958590532] [2022-12-14 09:47:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:08,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958590532] [2022-12-14 09:47:08,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958590532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:08,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:47:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:47:08,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063941293] [2022-12-14 09:47:08,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:08,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:47:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:47:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:47:08,656 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) [2022-12-14 09:47:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:08,737 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-12-14 09:47:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:47:08,739 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 [2022-12-14 09:47:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:08,747 INFO L225 Difference]: With dead ends: 37 [2022-12-14 09:47:08,748 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 09:47:08,749 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 [2022-12-14 09:47:08,752 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:08,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 09:47:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-12-14 09:47:08,776 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) [2022-12-14 09:47:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 09:47:08,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-12-14 09:47:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:08,778 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 09:47:08,778 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) [2022-12-14 09:47:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 09:47:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:47:08,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:08,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:47:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:47:08,779 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)] === [2022-12-14 09:47:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash 3168033, now seen corresponding path program 1 times [2022-12-14 09:47:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016592740] [2022-12-14 09:47:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:08,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016592740] [2022-12-14 09:47:08,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016592740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:08,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:47:08,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:47:08,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002126115] [2022-12-14 09:47:08,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:08,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:47:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:47:08,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:47:08,891 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) [2022-12-14 09:47:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:08,960 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-12-14 09:47:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:47:08,960 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 [2022-12-14 09:47:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:08,961 INFO L225 Difference]: With dead ends: 45 [2022-12-14 09:47:08,961 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 09:47:08,962 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 [2022-12-14 09:47:08,963 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:08,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:47:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 09:47:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2022-12-14 09:47:08,967 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) [2022-12-14 09:47:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 09:47:08,968 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2022-12-14 09:47:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:08,968 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 09:47:08,968 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) [2022-12-14 09:47:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 09:47:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:47:08,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:08,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:47:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:47:08,970 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)] === [2022-12-14 09:47:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 3170125, now seen corresponding path program 1 times [2022-12-14 09:47:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:08,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016903364] [2022-12-14 09:47:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:08,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:09,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:09,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016903364] [2022-12-14 09:47:09,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016903364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:09,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:47:09,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:47:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711505496] [2022-12-14 09:47:09,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:09,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:47:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:47:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:47:09,026 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) [2022-12-14 09:47:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:09,049 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-12-14 09:47:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:47:09,049 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 [2022-12-14 09:47:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:09,050 INFO L225 Difference]: With dead ends: 19 [2022-12-14 09:47:09,050 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 09:47:09,050 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 [2022-12-14 09:47:09,052 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 [2022-12-14 09:47:09,052 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] [2022-12-14 09:47:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 09:47:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 09:47:09,055 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) [2022-12-14 09:47:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 09:47:09,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2022-12-14 09:47:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:09,056 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 09:47:09,056 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) [2022-12-14 09:47:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 09:47:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:47:09,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:09,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:47:09,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:47:09,057 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)] === [2022-12-14 09:47:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:09,058 INFO L85 PathProgramCache]: Analyzing trace with hash 3170126, now seen corresponding path program 1 times [2022-12-14 09:47:09,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:09,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783154299] [2022-12-14 09:47:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:09,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:09,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783154299] [2022-12-14 09:47:09,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783154299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:09,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:47:09,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:47:09,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590510458] [2022-12-14 09:47:09,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:09,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:47:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:47:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:47:09,137 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) [2022-12-14 09:47:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:09,163 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 09:47:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:47:09,164 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 [2022-12-14 09:47:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:09,164 INFO L225 Difference]: With dead ends: 20 [2022-12-14 09:47:09,164 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 09:47:09,165 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 [2022-12-14 09:47:09,166 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 [2022-12-14 09:47:09,166 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] [2022-12-14 09:47:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 09:47:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 09:47:09,168 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) [2022-12-14 09:47:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 09:47:09,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-12-14 09:47:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:09,169 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 09:47:09,169 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) [2022-12-14 09:47:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 09:47:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:47:09,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:09,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:09,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:47:09,170 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)] === [2022-12-14 09:47:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:09,171 INFO L85 PathProgramCache]: Analyzing trace with hash -46754049, now seen corresponding path program 1 times [2022-12-14 09:47:09,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:09,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206380760] [2022-12-14 09:47:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:09,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:09,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206380760] [2022-12-14 09:47:09,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206380760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379506567] [2022-12-14 09:47:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:09,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:09,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:09,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:47:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:47:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:09,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:09,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379506567] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760194732] [2022-12-14 09:47:09,327 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:09,327 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:09,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:09,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:09,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:09,382 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 [2022-12-14 09:47:09,418 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 [2022-12-14 09:47:09,595 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:09,596 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 [2022-12-14 09:47:09,910 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:09,910 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 [2022-12-14 09:47:09,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:10,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [760194732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:10,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:10,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-12-14 09:47:10,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52907913] [2022-12-14 09:47:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:10,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:47:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:47:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:47:10,587 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) [2022-12-14 09:47:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:10,796 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-14 09:47:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:47:10,797 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 [2022-12-14 09:47:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:10,797 INFO L225 Difference]: With dead ends: 26 [2022-12-14 09:47:10,797 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 09:47:10,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:47:10,798 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:10,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 09:47:10,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-12-14 09:47:10,801 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) [2022-12-14 09:47:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-12-14 09:47:10,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2022-12-14 09:47:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:10,802 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-12-14 09:47:10,802 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) [2022-12-14 09:47:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-12-14 09:47:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:47:10,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:10,803 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-14 09:47:10,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:47:11,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:11,005 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)] === [2022-12-14 09:47:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash -46825228, now seen corresponding path program 1 times [2022-12-14 09:47:11,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786087106] [2022-12-14 09:47:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:11,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786087106] [2022-12-14 09:47:11,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786087106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543352642] [2022-12-14 09:47:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:11,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:11,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:47:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:47:11,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:11,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:11,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543352642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915212327] [2022-12-14 09:47:11,329 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:47:11,329 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:11,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:11,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:11,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:11,337 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 [2022-12-14 09:47:11,354 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 [2022-12-14 09:47:11,422 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 [2022-12-14 09:47:11,685 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 [2022-12-14 09:47:11,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:12,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [915212327] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:12,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:12,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2022-12-14 09:47:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294165094] [2022-12-14 09:47:12,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:12,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:47:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:47:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:47:12,397 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) [2022-12-14 09:47:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:12,453 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-12-14 09:47:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:47:12,454 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 [2022-12-14 09:47:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:12,454 INFO L225 Difference]: With dead ends: 24 [2022-12-14 09:47:12,454 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 09:47:12,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:47:12,455 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:12,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 09:47:12,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 09:47:12,457 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) [2022-12-14 09:47:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 09:47:12,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2022-12-14 09:47:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:12,458 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 09:47:12,458 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) [2022-12-14 09:47:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 09:47:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:47:12,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:12,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:12,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:47:12,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:47:12,660 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)] === [2022-12-14 09:47:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 894109178, now seen corresponding path program 1 times [2022-12-14 09:47:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:12,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622886018] [2022-12-14 09:47:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:12,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:12,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622886018] [2022-12-14 09:47:12,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622886018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683597629] [2022-12-14 09:47:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:12,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:12,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:12,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:47:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:47:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:12,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:47:12,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683597629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790098572] [2022-12-14 09:47:12,868 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:12,868 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:12,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:12,869 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:12,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:12,877 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 [2022-12-14 09:47:12,902 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:12,918 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 [2022-12-14 09:47:13,009 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 [2022-12-14 09:47:13,086 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:13,087 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 [2022-12-14 09:47:13,332 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 [2022-12-14 09:47:13,350 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 [2022-12-14 09:47:13,386 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 [2022-12-14 09:47:13,395 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:13,920 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 [2022-12-14 09:47:13,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:13,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:13,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 09:47:13,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787438533] [2022-12-14 09:47:13,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:13,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:47:13,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:47:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:47:13,922 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) [2022-12-14 09:47:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:14,074 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-14 09:47:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:47:14,074 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 [2022-12-14 09:47:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:14,075 INFO L225 Difference]: With dead ends: 64 [2022-12-14 09:47:14,075 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 09:47:14,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:47:14,076 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 147 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:14,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 25 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 09:47:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2022-12-14 09:47:14,079 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) [2022-12-14 09:47:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-12-14 09:47:14,079 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2022-12-14 09:47:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:14,079 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-12-14 09:47:14,079 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) [2022-12-14 09:47:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-12-14 09:47:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:47:14,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:14,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:14,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:47:14,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:14,281 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)] === [2022-12-14 09:47:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash 894111271, now seen corresponding path program 1 times [2022-12-14 09:47:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:14,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335648366] [2022-12-14 09:47:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:14,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335648366] [2022-12-14 09:47:14,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335648366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62896248] [2022-12-14 09:47:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:14,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:14,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:14,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:47:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:14,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:47:14,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:14,443 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 [2022-12-14 09:47:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:14,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62896248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068582174] [2022-12-14 09:47:14,539 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:14,539 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:14,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:14,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:14,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:14,547 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 [2022-12-14 09:47:14,568 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:14,588 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 [2022-12-14 09:47:14,678 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 [2022-12-14 09:47:14,744 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:14,744 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 [2022-12-14 09:47:14,980 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 [2022-12-14 09:47:14,993 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 [2022-12-14 09:47:15,034 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 [2022-12-14 09:47:15,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:15,537 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 [2022-12-14 09:47:15,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:15,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:15,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-12-14 09:47:15,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258346922] [2022-12-14 09:47:15,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:15,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:47:15,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:15,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:47:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:47:15,539 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) [2022-12-14 09:47:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:15,622 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-12-14 09:47:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:47:15,622 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 [2022-12-14 09:47:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:15,622 INFO L225 Difference]: With dead ends: 54 [2022-12-14 09:47:15,622 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 09:47:15,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:47:15,623 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:15,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:47:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 09:47:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-12-14 09:47:15,627 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) [2022-12-14 09:47:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-12-14 09:47:15,627 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2022-12-14 09:47:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:15,628 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-12-14 09:47:15,628 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) [2022-12-14 09:47:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-12-14 09:47:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:47:15,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:15,628 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 09:47:15,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:47:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:15,830 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)] === [2022-12-14 09:47:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:15,831 INFO L85 PathProgramCache]: Analyzing trace with hash -917063813, now seen corresponding path program 2 times [2022-12-14 09:47:15,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:15,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641359475] [2022-12-14 09:47:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:15,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:15,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641359475] [2022-12-14 09:47:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641359475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633959785] [2022-12-14 09:47:15,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:47:15,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:15,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:15,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:15,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:47:15,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:47:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:47:15,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:47:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:47:16,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:47:16,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633959785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:16,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:47:16,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-12-14 09:47:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483310380] [2022-12-14 09:47:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:16,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:47:16,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:47:16,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:47:16,022 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) [2022-12-14 09:47:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:16,059 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-12-14 09:47:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:47:16,059 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 [2022-12-14 09:47:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:16,060 INFO L225 Difference]: With dead ends: 76 [2022-12-14 09:47:16,060 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 09:47:16,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:47:16,061 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 [2022-12-14 09:47:16,061 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] [2022-12-14 09:47:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 09:47:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2022-12-14 09:47:16,065 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) [2022-12-14 09:47:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-12-14 09:47:16,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 13 [2022-12-14 09:47:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:16,066 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-12-14 09:47:16,066 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) [2022-12-14 09:47:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-12-14 09:47:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:47:16,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:16,067 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 09:47:16,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:47:16,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:16,268 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)] === [2022-12-14 09:47:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash 332416397, now seen corresponding path program 3 times [2022-12-14 09:47:16,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:16,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643334928] [2022-12-14 09:47:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:16,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:47:16,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643334928] [2022-12-14 09:47:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643334928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987068835] [2022-12-14 09:47:16,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:47:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:16,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:16,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:47:16,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:47:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:47:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:47:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:47:16,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:47:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987068835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374643550] [2022-12-14 09:47:16,421 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:16,421 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:16,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:16,421 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:16,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:16,429 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 [2022-12-14 09:47:16,451 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:16,471 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 [2022-12-14 09:47:16,574 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 [2022-12-14 09:47:16,624 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:16,624 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 [2022-12-14 09:47:16,838 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 [2022-12-14 09:47:16,853 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 [2022-12-14 09:47:16,884 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 [2022-12-14 09:47:16,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:17,317 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 [2022-12-14 09:47:17,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:17,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:17,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 09:47:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875530137] [2022-12-14 09:47:17,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:47:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:47:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:47:17,319 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) [2022-12-14 09:47:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:17,360 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-12-14 09:47:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:47:17,360 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 [2022-12-14 09:47:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:17,361 INFO L225 Difference]: With dead ends: 49 [2022-12-14 09:47:17,361 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 09:47:17,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:47:17,361 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:17,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 11 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:47:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 09:47:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-12-14 09:47:17,363 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) [2022-12-14 09:47:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-12-14 09:47:17,363 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 13 [2022-12-14 09:47:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:17,363 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-12-14 09:47:17,364 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) [2022-12-14 09:47:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-12-14 09:47:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:47:17,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:17,364 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2022-12-14 09:47:17,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:47:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:47:17,566 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)] === [2022-12-14 09:47:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792922, now seen corresponding path program 1 times [2022-12-14 09:47:17,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534769995] [2022-12-14 09:47:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:17,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:17,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534769995] [2022-12-14 09:47:17,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534769995] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:17,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261035478] [2022-12-14 09:47:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:17,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:17,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:17,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:17,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:47:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:17,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:47:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:17,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:17,719 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:47:17,720 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 [2022-12-14 09:47:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:17,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261035478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154868371] [2022-12-14 09:47:17,727 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:17,727 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:17,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:17,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:17,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:17,735 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 [2022-12-14 09:47:17,759 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:17,778 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 [2022-12-14 09:47:17,909 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 [2022-12-14 09:47:17,972 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:17,972 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 [2022-12-14 09:47:18,208 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 [2022-12-14 09:47:18,228 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 [2022-12-14 09:47:18,268 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 [2022-12-14 09:47:18,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:18,748 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 [2022-12-14 09:47:18,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:18,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:18,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-14 09:47:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340158125] [2022-12-14 09:47:18,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:47:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:47:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:47:18,749 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) [2022-12-14 09:47:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:18,775 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-12-14 09:47:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:47:18,775 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 [2022-12-14 09:47:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:18,776 INFO L225 Difference]: With dead ends: 42 [2022-12-14 09:47:18,776 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 09:47:18,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:47:18,777 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 [2022-12-14 09:47:18,777 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] [2022-12-14 09:47:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 09:47:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 09:47:18,780 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) [2022-12-14 09:47:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-12-14 09:47:18,780 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 14 [2022-12-14 09:47:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:18,780 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-12-14 09:47:18,780 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) [2022-12-14 09:47:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-12-14 09:47:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:47:18,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:18,781 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2022-12-14 09:47:18,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:47:18,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:47:18,982 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)] === [2022-12-14 09:47:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792923, now seen corresponding path program 1 times [2022-12-14 09:47:18,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:18,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587833911] [2022-12-14 09:47:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:18,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:47:19,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587833911] [2022-12-14 09:47:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587833911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480400573] [2022-12-14 09:47:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:19,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:19,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:19,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:47:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:47:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:19,116 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 [2022-12-14 09:47:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:47:19,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:47:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480400573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975022408] [2022-12-14 09:47:19,215 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:19,216 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:19,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:19,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:19,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:19,223 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 [2022-12-14 09:47:19,239 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:19,258 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 [2022-12-14 09:47:19,342 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 [2022-12-14 09:47:19,388 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:19,388 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 [2022-12-14 09:47:19,620 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 [2022-12-14 09:47:19,635 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 [2022-12-14 09:47:19,665 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 [2022-12-14 09:47:19,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:20,176 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 [2022-12-14 09:47:20,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:20,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:20,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-14 09:47:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068245329] [2022-12-14 09:47:20,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:20,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:47:20,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:47:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:47:20,178 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) [2022-12-14 09:47:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:20,249 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-12-14 09:47:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:47:20,250 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 [2022-12-14 09:47:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:20,250 INFO L225 Difference]: With dead ends: 70 [2022-12-14 09:47:20,250 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 09:47:20,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:47:20,251 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:20,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:47:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 09:47:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2022-12-14 09:47:20,254 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) [2022-12-14 09:47:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2022-12-14 09:47:20,254 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 14 [2022-12-14 09:47:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:20,254 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2022-12-14 09:47:20,254 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) [2022-12-14 09:47:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2022-12-14 09:47:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:47:20,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:20,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2022-12-14 09:47:20,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:47:20,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 09:47:20,456 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)] === [2022-12-14 09:47:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash 39022099, now seen corresponding path program 4 times [2022-12-14 09:47:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:20,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046631953] [2022-12-14 09:47:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:20,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046631953] [2022-12-14 09:47:20,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046631953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654610045] [2022-12-14 09:47:20,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:47:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:20,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:20,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:47:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:20,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:47:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:20,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:20,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654610045] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977523891] [2022-12-14 09:47:20,857 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:20,857 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:20,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:20,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:20,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:20,864 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 [2022-12-14 09:47:20,882 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:20,896 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 [2022-12-14 09:47:20,989 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 [2022-12-14 09:47:21,063 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 [2022-12-14 09:47:21,282 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 [2022-12-14 09:47:21,306 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 [2022-12-14 09:47:21,342 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 [2022-12-14 09:47:21,360 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:21,759 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 [2022-12-14 09:47:21,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:21,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:21,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2022-12-14 09:47:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801640001] [2022-12-14 09:47:21,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:21,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:47:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:47:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:47:21,761 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) [2022-12-14 09:47:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:22,509 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2022-12-14 09:47:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 09:47:22,510 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 [2022-12-14 09:47:22,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:22,511 INFO L225 Difference]: With dead ends: 163 [2022-12-14 09:47:22,511 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 09:47:22,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:47:22,512 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 240 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:22,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 31 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:47:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 09:47:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2022-12-14 09:47:22,515 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) [2022-12-14 09:47:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2022-12-14 09:47:22,516 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 16 [2022-12-14 09:47:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:22,516 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2022-12-14 09:47:22,516 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) [2022-12-14 09:47:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2022-12-14 09:47:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:47:22,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:22,517 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1] [2022-12-14 09:47:22,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:47:22,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 09:47:22,718 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)] === [2022-12-14 09:47:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1428680581, now seen corresponding path program 5 times [2022-12-14 09:47:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197965038] [2022-12-14 09:47:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:47:22,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:22,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197965038] [2022-12-14 09:47:22,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197965038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:22,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796218367] [2022-12-14 09:47:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:47:22,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:22,828 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:22,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:47:22,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:47:22,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:47:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:47:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:47:23,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:47:23,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796218367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536593930] [2022-12-14 09:47:23,152 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:23,152 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:23,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:23,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:23,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:23,159 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 [2022-12-14 09:47:23,178 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:23,194 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 [2022-12-14 09:47:23,292 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 [2022-12-14 09:47:23,336 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:23,336 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 [2022-12-14 09:47:23,576 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 [2022-12-14 09:47:23,594 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 [2022-12-14 09:47:23,635 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 [2022-12-14 09:47:23,650 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:24,128 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 [2022-12-14 09:47:24,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:24,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:24,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2022-12-14 09:47:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535595744] [2022-12-14 09:47:24,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 09:47:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 09:47:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:47:24,130 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) [2022-12-14 09:47:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:24,525 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2022-12-14 09:47:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:47:24,526 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 [2022-12-14 09:47:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:24,526 INFO L225 Difference]: With dead ends: 80 [2022-12-14 09:47:24,527 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 09:47:24,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:47:24,528 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 179 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:24,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 7 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 09:47:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2022-12-14 09:47:24,531 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) [2022-12-14 09:47:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-12-14 09:47:24,532 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2022-12-14 09:47:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:24,532 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-12-14 09:47:24,532 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) [2022-12-14 09:47:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-12-14 09:47:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 09:47:24,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:24,533 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1] [2022-12-14 09:47:24,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 09:47:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:24,734 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)] === [2022-12-14 09:47:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:24,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886260, now seen corresponding path program 2 times [2022-12-14 09:47:24,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:24,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424085460] [2022-12-14 09:47:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:47:24,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424085460] [2022-12-14 09:47:24,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424085460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97813987] [2022-12-14 09:47:24,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:47:24,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:24,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:24,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:47:24,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:47:24,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:47:24,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:47:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:24,906 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 [2022-12-14 09:47:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:47:25,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:47:25,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97813987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:25,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288884275] [2022-12-14 09:47:25,159 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 09:47:25,159 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:25,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:25,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:25,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:25,164 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 [2022-12-14 09:47:25,183 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:25,194 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 [2022-12-14 09:47:25,263 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 [2022-12-14 09:47:25,331 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 [2022-12-14 09:47:25,500 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 [2022-12-14 09:47:25,520 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 [2022-12-14 09:47:25,548 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 [2022-12-14 09:47:25,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:25,923 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 [2022-12-14 09:47:25,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:25,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:25,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-12-14 09:47:25,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647555369] [2022-12-14 09:47:25,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:25,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:47:25,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:47:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:47:25,924 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) [2022-12-14 09:47:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:26,204 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-12-14 09:47:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 09:47:26,205 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 [2022-12-14 09:47:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:26,205 INFO L225 Difference]: With dead ends: 50 [2022-12-14 09:47:26,205 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 09:47:26,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 09:47:26,206 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:26,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 20 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 09:47:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-12-14 09:47:26,209 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) [2022-12-14 09:47:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-12-14 09:47:26,209 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2022-12-14 09:47:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:26,209 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-12-14 09:47:26,210 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) [2022-12-14 09:47:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-12-14 09:47:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 09:47:26,211 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:26,211 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:26,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:47:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:47:26,411 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)] === [2022-12-14 09:47:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash -834078593, now seen corresponding path program 1 times [2022-12-14 09:47:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684724888] [2022-12-14 09:47:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:47:26,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:26,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684724888] [2022-12-14 09:47:26,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684724888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:26,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845828191] [2022-12-14 09:47:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:26,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:26,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:47:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:26,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:47:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:47:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:47:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845828191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246921375] [2022-12-14 09:47:26,701 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 09:47:26,701 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:26,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:26,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:26,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:26,710 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 [2022-12-14 09:47:26,729 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:26,745 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 [2022-12-14 09:47:26,813 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 [2022-12-14 09:47:26,904 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:26,904 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 [2022-12-14 09:47:27,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2022-12-14 09:47:27,122 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 [2022-12-14 09:47:27,167 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 [2022-12-14 09:47:27,236 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 [2022-12-14 09:47:27,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:28,051 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 [2022-12-14 09:47:28,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:28,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:28,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-12-14 09:47:28,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170732386] [2022-12-14 09:47:28,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:28,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 09:47:28,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 09:47:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-12-14 09:47:28,052 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) [2022-12-14 09:47:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:28,307 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-12-14 09:47:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:47:28,307 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 [2022-12-14 09:47:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:28,308 INFO L225 Difference]: With dead ends: 91 [2022-12-14 09:47:28,308 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 09:47:28,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 09:47:28,309 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 165 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:28,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 27 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 09:47:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2022-12-14 09:47:28,312 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) [2022-12-14 09:47:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-12-14 09:47:28,312 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 33 [2022-12-14 09:47:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:28,312 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-12-14 09:47:28,313 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) [2022-12-14 09:47:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-12-14 09:47:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 09:47:28,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:28,313 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:28,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:47:28,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:47:28,515 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)] === [2022-12-14 09:47:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash 235722060, now seen corresponding path program 2 times [2022-12-14 09:47:28,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633088063] [2022-12-14 09:47:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:47:28,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633088063] [2022-12-14 09:47:28,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633088063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005015337] [2022-12-14 09:47:28,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:47:28,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:28,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:28,647 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:28,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:47:28,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:47:28,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:47:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:47:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:28,823 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 [2022-12-14 09:47:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-12-14 09:47:28,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:47:28,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005015337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:28,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:47:28,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2022-12-14 09:47:28,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95144059] [2022-12-14 09:47:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:28,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:47:28,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:47:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=43, Unknown=1, NotChecked=14, Total=90 [2022-12-14 09:47:28,825 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) [2022-12-14 09:47:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:28,838 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-12-14 09:47:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:47:28,839 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 [2022-12-14 09:47:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:28,839 INFO L225 Difference]: With dead ends: 63 [2022-12-14 09:47:28,839 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 09:47:28,840 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 [2022-12-14 09:47:28,840 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:28,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-12-14 09:47:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 09:47:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-14 09:47:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 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) [2022-12-14 09:47:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-12-14 09:47:28,842 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 48 [2022-12-14 09:47:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:28,842 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-12-14 09:47:28,842 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) [2022-12-14 09:47:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-12-14 09:47:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:47:28,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:28,843 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2022-12-14 09:47:28,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:47:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:47:29,044 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)] === [2022-12-14 09:47:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -79820279, now seen corresponding path program 1 times [2022-12-14 09:47:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693550576] [2022-12-14 09:47:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-12-14 09:47:29,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693550576] [2022-12-14 09:47:29,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693550576] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815920022] [2022-12-14 09:47:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:29,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:29,153 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:29,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:47:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:47:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 09:47:29,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 09:47:29,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815920022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:29,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658945438] [2022-12-14 09:47:29,434 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 09:47:29,434 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:29,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:29,434 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:29,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:29,443 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 [2022-12-14 09:47:29,462 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:47:29,477 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 [2022-12-14 09:47:29,582 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 [2022-12-14 09:47:29,626 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 09:47:29,626 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 [2022-12-14 09:47:29,820 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 [2022-12-14 09:47:29,829 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 [2022-12-14 09:47:29,857 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 [2022-12-14 09:47:30,063 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 [2022-12-14 09:47:30,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:31,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3596#(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|) (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) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_30|)) (= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_30|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) (- 4))) 1) |ULTIMATE.start_main_~i~1#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|) (<= 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 [2022-12-14 09:47:31,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:31,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:31,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-12-14 09:47:31,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153374392] [2022-12-14 09:47:31,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 09:47:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 09:47:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-12-14 09:47:31,087 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2022-12-14 09:47:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:31,514 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-12-14 09:47:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 09:47:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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 61 [2022-12-14 09:47:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:31,515 INFO L225 Difference]: With dead ends: 105 [2022-12-14 09:47:31,515 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 09:47:31,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 09:47:31,517 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 175 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:31,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 9 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:47:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 09:47:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2022-12-14 09:47:31,520 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) [2022-12-14 09:47:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-12-14 09:47:31,520 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 61 [2022-12-14 09:47:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:31,521 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-12-14 09:47:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2022-12-14 09:47:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-12-14 09:47:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 09:47:31,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:31,522 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2022-12-14 09:47:31,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:47:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:47:31,723 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)] === [2022-12-14 09:47:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash 260105500, now seen corresponding path program 2 times [2022-12-14 09:47:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:31,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060605164] [2022-12-14 09:47:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:31,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-12-14 09:47:31,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060605164] [2022-12-14 09:47:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060605164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648900853] [2022-12-14 09:47:31,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:47:31,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:31,901 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:31,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:47:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:47:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:47:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:47:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:32,174 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 [2022-12-14 09:47:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-12-14 09:47:32,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:47:32,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648900853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:32,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:47:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 11 [2022-12-14 09:47:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123094615] [2022-12-14 09:47:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:47:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:47:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-12-14 09:47:32,176 INFO L87 Difference]: Start difference. First operand 83 states and 87 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) [2022-12-14 09:47:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:32,186 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-12-14 09:47:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:47:32,187 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 82 [2022-12-14 09:47:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:32,187 INFO L225 Difference]: With dead ends: 82 [2022-12-14 09:47:32,187 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 09:47:32,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-12-14 09:47:32,188 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:32,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-12-14 09:47:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 09:47:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 09:47:32,189 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) [2022-12-14 09:47:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 09:47:32,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2022-12-14 09:47:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:32,189 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 09:47:32,189 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) [2022-12-14 09:47:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 09:47:32,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 09:47:32,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-12-14 09:47:32,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-12-14 09:47:32,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-12-14 09:47:32,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-12-14 09:47:32,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-12-14 09:47:32,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-12-14 09:47:32,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-12-14 09:47:32,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-12-14 09:47:32,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:47:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:32,396 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:32,397 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:47:32,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:47:32 BoogieIcfgContainer [2022-12-14 09:47:32,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:47:32,400 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:47:32,400 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:47:32,400 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:47:32,401 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:47:08" (3/4) ... [2022-12-14 09:47:32,403 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 09:47:32,409 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-12-14 09:47:32,409 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-12-14 09:47:32,409 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 09:47:32,409 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 09:47:32,429 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:47:32,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:47:32,430 INFO L158 Benchmark]: Toolchain (without parser) took 24577.64ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 84.5MB in the beginning and 71.5MB in the end (delta: 12.9MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2022-12-14 09:47:32,430 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 123.7MB. Free memory is still 93.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:47:32,430 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.99ms. Allocated memory is still 123.7MB. Free memory was 84.5MB in the beginning and 74.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:47:32,430 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.56ms. Allocated memory is still 123.7MB. Free memory was 74.6MB in the beginning and 73.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:47:32,430 INFO L158 Benchmark]: Boogie Preprocessor took 20.31ms. Allocated memory is still 123.7MB. Free memory was 73.0MB in the beginning and 71.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:47:32,430 INFO L158 Benchmark]: RCFGBuilder took 316.10ms. Allocated memory is still 123.7MB. Free memory was 71.9MB in the beginning and 58.4MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 09:47:32,431 INFO L158 Benchmark]: TraceAbstraction took 24011.57ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 57.6MB in the beginning and 74.5MB in the end (delta: -16.9MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2022-12-14 09:47:32,431 INFO L158 Benchmark]: Witness Printer took 29.45ms. Allocated memory is still 153.1MB. Free memory was 74.5MB in the beginning and 71.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:47:32,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 123.7MB. Free memory is still 93.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.99ms. Allocated memory is still 123.7MB. Free memory was 84.5MB in the beginning and 74.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.56ms. Allocated memory is still 123.7MB. Free memory was 74.6MB in the beginning and 73.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.31ms. Allocated memory is still 123.7MB. Free memory was 73.0MB in the beginning and 71.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 316.10ms. Allocated memory is still 123.7MB. Free memory was 71.9MB in the beginning and 58.4MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 24011.57ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 57.6MB in the beginning and 74.5MB in the end (delta: -16.9MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * Witness Printer took 29.45ms. Allocated memory is still 153.1MB. Free memory was 74.5MB in the beginning and 71.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. 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: 24.0s, OverallIterations: 19, TraceHistogramMax: 14, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1202 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1202 mSDsluCounter, 266 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 24 IncrementalHoareTripleChecker+Unchecked, 172 mSDsCounter, 187 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1926 IncrementalHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 187 mSolverCounterUnsat, 94 mSDtfsCounter, 1926 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1015 GetRequests, 661 SyntacticMatches, 18 SemanticMatches, 336 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=18, InterpolantAutomatonStates: 195, 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, 19 MinimizatonAttempts, 297 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 762 NumberOfCodeBlocks, 609 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 946 ConstructedInterpolants, 128 QuantifiedInterpolants, 5684 SizeOfPredicates, 56 NumberOfNonLiveVariables, 1774 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 46 InterpolantComputations, 7 PerfectInterpolantSequences, 1844/2654 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: 1.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 23, TOOLS_POST_TIME: 0.9s, 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: 0.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, 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: 0.7s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.7s, 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! [2022-12-14 09:47:32,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc57aca1-5ea6-496a-a4ce-a36ab1708542/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE