./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/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_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/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_04c79199-a9aa-43f6-be90-7fb14161012b/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 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- 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 16:13:16,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:13:16,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:13:16,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:13:16,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:13:16,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:13:16,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:13:16,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:13:16,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:13:16,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:13:16,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:13:16,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:13:16,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:13:16,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:13:16,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:13:16,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:13:16,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:13:16,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:13:16,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:13:16,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:13:16,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:13:16,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:13:16,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:13:16,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:13:16,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:13:16,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:13:16,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:13:16,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:13:16,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:13:16,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:13:16,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:13:16,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:13:16,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:13:16,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:13:16,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:13:16,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:13:16,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:13:16,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:13:16,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:13:16,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:13:16,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:13:16,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 16:13:16,590 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:13:16,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:13:16,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:13:16,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:13:16,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:13:16,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:13:16,592 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:13:16,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:13:16,592 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:13:16,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:13:16,593 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:13:16,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:13:16,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:13:16,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:13:16,593 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:13:16,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:13:16,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:13:16,594 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:13:16,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 16:13:16,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 16:13:16,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:13:16,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:13:16,595 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 16:13:16,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:13:16,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:13:16,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:13:16,596 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 16:13:16,596 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 16:13:16,596 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 16:13:16,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:13:16,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 16:13:16,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:13:16,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:13:16,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:13:16,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:13:16,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:13:16,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:13:16,598 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:13:16,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:13:16,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:13:16,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:13:16,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:13:16,599 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_04c79199-a9aa-43f6-be90-7fb14161012b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2022-12-14 16:13:16,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:13:16,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:13:16,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:13:16,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:13:16,803 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:13:16,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2022-12-14 16:13:19,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:13:19,594 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:13:19,595 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2022-12-14 16:13:19,605 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/data/c1559acbc/e7884c4b61f744b0910a138d3456087b/FLAGb63d39c6d [2022-12-14 16:13:19,618 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/data/c1559acbc/e7884c4b61f744b0910a138d3456087b [2022-12-14 16:13:19,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:13:19,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:13:19,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:13:19,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:13:19,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:13:19,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3e2f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19, skipping insertion in model container [2022-12-14 16:13:19,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:13:19,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:13:19,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:13:19,857 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:13:19,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:13:19,901 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:13:19,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19 WrapperNode [2022-12-14 16:13:19,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:13:19,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:13:19,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:13:19,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:13:19,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,930 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-12-14 16:13:19,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:13:19,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:13:19,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:13:19,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:13:19,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:13:19,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:13:19,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:13:19,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:13:19,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (1/1) ... [2022-12-14 16:13:19,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:13:19,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:19,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:13:19,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:13:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 16:13:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 16:13:20,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 16:13:20,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 16:13:20,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:13:20,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:13:20,075 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:13:20,077 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:13:20,205 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:13:20,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:13:20,265 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 16:13:20,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:13:20 BoogieIcfgContainer [2022-12-14 16:13:20,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:13:20,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:13:20,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:13:20,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:13:20,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:13:19" (1/3) ... [2022-12-14 16:13:20,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288f543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:13:20, skipping insertion in model container [2022-12-14 16:13:20,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:13:19" (2/3) ... [2022-12-14 16:13:20,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288f543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:13:20, skipping insertion in model container [2022-12-14 16:13:20,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:13:20" (3/3) ... [2022-12-14 16:13:20,274 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2022-12-14 16:13:20,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:13:20,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-12-14 16:13:20,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:13:20,326 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;@236c945c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:13:20,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-12-14 16:13:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 15 states have (on average 2.6) internal successors, (39), 34 states have internal predecessors, (39), 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 16:13:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 16:13:20,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:20,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 16:13:20,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 145849, now seen corresponding path program 1 times [2022-12-14 16:13:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:20,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116387145] [2022-12-14 16:13:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:20,560 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 16:13:20,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:20,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116387145] [2022-12-14 16:13:20,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116387145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:20,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:20,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 16:13:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984626808] [2022-12-14 16:13:20,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:20,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:13:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:13:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:13:20,592 INFO L87 Difference]: Start difference. First operand has 35 states, 15 states have (on average 2.6) internal successors, (39), 34 states have internal predecessors, (39), 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, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 16:13:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:20,652 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-12-14 16:13:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:13:20,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 16:13:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:20,662 INFO L225 Difference]: With dead ends: 33 [2022-12-14 16:13:20,662 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 16:13:20,664 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 16:13:20,667 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:20,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 14 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 16:13:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 16:13:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 31 states have internal predecessors, (35), 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 16:13:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-12-14 16:13:20,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 3 [2022-12-14 16:13:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:20,699 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-12-14 16:13:20,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 16:13:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-12-14 16:13:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 16:13:20,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:20,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 16:13:20,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:13:20,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash 145850, now seen corresponding path program 1 times [2022-12-14 16:13:20,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:20,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648224999] [2022-12-14 16:13:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:20,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:20,944 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 16:13:20,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:20,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648224999] [2022-12-14 16:13:20,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648224999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:20,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:20,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:13:20,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462260468] [2022-12-14 16:13:20,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:20,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:13:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:13:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:20,948 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 16:13:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:21,059 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-12-14 16:13:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:13:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2022-12-14 16:13:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:21,061 INFO L225 Difference]: With dead ends: 62 [2022-12-14 16:13:21,061 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 16:13:21,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:13:21,062 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:21,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 16:13:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 34. [2022-12-14 16:13:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 2.235294117647059) internal successors, (38), 33 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 16:13:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-12-14 16:13:21,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 3 [2022-12-14 16:13:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:21,069 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-12-14 16:13:21,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 16:13:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-12-14 16:13:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 16:13:21,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:21,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 16:13:21,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 16:13:21,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 4614496, now seen corresponding path program 1 times [2022-12-14 16:13:21,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:21,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210398639] [2022-12-14 16:13:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:21,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210398639] [2022-12-14 16:13:21,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210398639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:21,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:21,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:13:21,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640790263] [2022-12-14 16:13:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:21,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:13:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:13:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:21,221 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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 16:13:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:21,260 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-12-14 16:13:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:13:21,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 16:13:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:21,261 INFO L225 Difference]: With dead ends: 33 [2022-12-14 16:13:21,261 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 16:13:21,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:21,262 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:21,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 16:13:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 16:13:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 2.176470588235294) internal successors, (37), 32 states have internal predecessors, (37), 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 16:13:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-14 16:13:21,266 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 4 [2022-12-14 16:13:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:21,266 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-14 16:13:21,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 16:13:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-14 16:13:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 16:13:21,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:21,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 16:13:21,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 16:13:21,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:21,268 INFO L85 PathProgramCache]: Analyzing trace with hash 4612192, now seen corresponding path program 1 times [2022-12-14 16:13:21,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:21,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282380260] [2022-12-14 16:13:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:21,298 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 16:13:21,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282380260] [2022-12-14 16:13:21,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282380260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:21,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:21,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 16:13:21,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82603662] [2022-12-14 16:13:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:21,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:13:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:13:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:13:21,301 INFO L87 Difference]: Start difference. First operand 33 states and 37 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 16:13:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:21,328 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-12-14 16:13:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:13:21,328 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 16:13:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:21,329 INFO L225 Difference]: With dead ends: 31 [2022-12-14 16:13:21,329 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 16:13:21,329 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 16:13:21,330 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:21,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 16:13:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 16:13:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 30 states have internal predecessors, (35), 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 16:13:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-14 16:13:21,334 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 4 [2022-12-14 16:13:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:21,334 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-14 16:13:21,334 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 16:13:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-14 16:13:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 16:13:21,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:21,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 16:13:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 16:13:21,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 4612193, now seen corresponding path program 1 times [2022-12-14 16:13:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:21,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272057185] [2022-12-14 16:13:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:21,477 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 16:13:21,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:21,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272057185] [2022-12-14 16:13:21,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272057185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:21,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:21,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:13:21,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843549783] [2022-12-14 16:13:21,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:21,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:13:21,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:13:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:13:21,479 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 16:13:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:21,564 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-12-14 16:13:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:13:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 16:13:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:21,565 INFO L225 Difference]: With dead ends: 55 [2022-12-14 16:13:21,565 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 16:13:21,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:13:21,566 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:21,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 16:13:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-12-14 16:13:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 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 16:13:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-14 16:13:21,570 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 4 [2022-12-14 16:13:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:21,571 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-14 16:13:21,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 16:13:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-14 16:13:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 16:13:21,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:21,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 16:13:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 16:13:21,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash 143049370, now seen corresponding path program 1 times [2022-12-14 16:13:21,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:21,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68386795] [2022-12-14 16:13:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:21,729 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 16:13:21,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:21,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68386795] [2022-12-14 16:13:21,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68386795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:21,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:21,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:13:21,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768156439] [2022-12-14 16:13:21,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:21,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:13:21,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:13:21,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:13:21,731 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 16:13:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:21,764 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-12-14 16:13:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:13:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-12-14 16:13:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:21,764 INFO L225 Difference]: With dead ends: 32 [2022-12-14 16:13:21,764 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 16:13:21,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:13:21,766 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:21,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 16:13:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 16:13:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 31 states have internal predecessors, (37), 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 16:13:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-12-14 16:13:21,769 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 5 [2022-12-14 16:13:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:21,769 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-12-14 16:13:21,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 16:13:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-12-14 16:13:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 16:13:21,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:21,770 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 16:13:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 16:13:21,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 140237547, now seen corresponding path program 1 times [2022-12-14 16:13:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:21,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383414239] [2022-12-14 16:13:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:21,938 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 16:13:21,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383414239] [2022-12-14 16:13:21,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383414239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808168025] [2022-12-14 16:13:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:21,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:21,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:21,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:13:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 16:13:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:22,090 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 9 treesize of output 11 [2022-12-14 16:13:22,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 16:13:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:22,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:22,308 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 16:13:22,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808168025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423999681] [2022-12-14 16:13:22,326 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 16:13:22,326 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:22,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:22,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:22,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:22,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:22,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:22,488 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 14 treesize of output 10 [2022-12-14 16:13:22,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:22,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '542#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:22,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:22,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:22,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 16:13:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228029988] [2022-12-14 16:13:22,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:22,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 16:13:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:22,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 16:13:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:13:22,818 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 16:13:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:23,071 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-12-14 16:13:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:13:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 5 [2022-12-14 16:13:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:23,072 INFO L225 Difference]: With dead ends: 84 [2022-12-14 16:13:23,072 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 16:13:23,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-14 16:13:23,073 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 217 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:23,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 154 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:13:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 16:13:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 29. [2022-12-14 16:13:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 28 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 16:13:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-14 16:13:23,077 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 5 [2022-12-14 16:13:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:23,077 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-14 16:13:23,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 16:13:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-14 16:13:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 16:13:23,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:23,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 16:13:23,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:13:23,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 16:13:23,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 139564695, now seen corresponding path program 1 times [2022-12-14 16:13:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:23,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413557748] [2022-12-14 16:13:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:23,356 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 16:13:23,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:23,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413557748] [2022-12-14 16:13:23,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413557748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:23,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:23,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:13:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341868358] [2022-12-14 16:13:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:23,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:13:23,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:13:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:13:23,358 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 16:13:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:23,412 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-12-14 16:13:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:13:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 16:13:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:23,413 INFO L225 Difference]: With dead ends: 45 [2022-12-14 16:13:23,413 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 16:13:23,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:13:23,414 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:23,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 16 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 16:13:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-12-14 16:13:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 2.0) internal successors, (46), 34 states have internal predecessors, (46), 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 16:13:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-12-14 16:13:23,417 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 6 [2022-12-14 16:13:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:23,417 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-12-14 16:13:23,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 16:13:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-12-14 16:13:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 16:13:23,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:23,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 16:13:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 16:13:23,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash 139564694, now seen corresponding path program 1 times [2022-12-14 16:13:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650647385] [2022-12-14 16:13:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:23,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:23,455 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 16:13:23,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650647385] [2022-12-14 16:13:23,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650647385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:23,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:23,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:13:23,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255006232] [2022-12-14 16:13:23,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:23,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:13:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:23,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:13:23,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:23,457 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 16:13:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:23,489 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-12-14 16:13:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:13:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 16:13:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:23,490 INFO L225 Difference]: With dead ends: 32 [2022-12-14 16:13:23,490 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 16:13:23,490 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 16:13:23,491 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:23,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 16:13:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 16:13:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 31 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 16:13:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-12-14 16:13:23,493 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 6 [2022-12-14 16:13:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:23,493 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-12-14 16:13:23,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 16:13:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-12-14 16:13:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 16:13:23,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:23,494 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 16:13:23,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 16:13:23,494 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash 137416840, now seen corresponding path program 1 times [2022-12-14 16:13:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:23,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559831760] [2022-12-14 16:13:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:23,704 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 16:13:23,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559831760] [2022-12-14 16:13:23,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559831760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261470947] [2022-12-14 16:13:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:23,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:23,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:23,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:13:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 16:13:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:23,777 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 16:13:23,778 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 16:13:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:23,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:24,020 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 16:13:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261470947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956224080] [2022-12-14 16:13:24,021 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 16:13:24,021 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:24,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:24,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:24,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:24,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:24,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:24,120 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 14 treesize of output 10 [2022-12-14 16:13:24,143 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 14 treesize of output 10 [2022-12-14 16:13:24,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:24,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet17#1|)) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= |ULTIMATE.start_main_#t~nondet17#1| 127) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:24,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:24,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 16:13:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913002299] [2022-12-14 16:13:24,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 16:13:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 16:13:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 16:13:24,519 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 16:13:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:24,740 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2022-12-14 16:13:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:13:24,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 16:13:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:24,741 INFO L225 Difference]: With dead ends: 80 [2022-12-14 16:13:24,741 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 16:13:24,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-12-14 16:13:24,742 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 163 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:24,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 83 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 16:13:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2022-12-14 16:13:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 28 states have internal predecessors, (36), 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 16:13:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-12-14 16:13:24,745 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 6 [2022-12-14 16:13:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:24,745 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-12-14 16:13:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 16:13:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-12-14 16:13:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:13:24,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:24,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:24,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 16:13:24,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 16:13:24,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash 244834790, now seen corresponding path program 1 times [2022-12-14 16:13:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:24,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816852542] [2022-12-14 16:13:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,008 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 16:13:25,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816852542] [2022-12-14 16:13:25,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816852542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:25,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:25,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:13:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199978268] [2022-12-14 16:13:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:13:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:13:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:13:25,010 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 16:13:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:25,030 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-12-14 16:13:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:13:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-12-14 16:13:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:25,031 INFO L225 Difference]: With dead ends: 27 [2022-12-14 16:13:25,031 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 16:13:25,031 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 16:13:25,032 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:25,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 16:13:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 16:13:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 26 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 16:13:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-12-14 16:13:25,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 9 [2022-12-14 16:13:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:25,035 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-12-14 16:13:25,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 16:13:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-12-14 16:13:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:13:25,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:25,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:25,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 16:13:25,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash 244834791, now seen corresponding path program 1 times [2022-12-14 16:13:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:25,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471263657] [2022-12-14 16:13:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,130 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 16:13:25,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471263657] [2022-12-14 16:13:25,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471263657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:25,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:25,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:13:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638453439] [2022-12-14 16:13:25,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:25,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:13:25,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:13:25,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:25,131 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 16:13:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:25,174 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-12-14 16:13:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:13:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-12-14 16:13:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:25,175 INFO L225 Difference]: With dead ends: 30 [2022-12-14 16:13:25,175 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 16:13:25,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:13:25,176 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:25,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 16:13:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-12-14 16:13:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 27 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 16:13:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 16:13:25,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2022-12-14 16:13:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:25,178 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 16:13:25,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 16:13:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 16:13:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:13:25,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:25,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:25,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 16:13:25,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 244843864, now seen corresponding path program 1 times [2022-12-14 16:13:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559634650] [2022-12-14 16:13:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:25,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:25,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559634650] [2022-12-14 16:13:25,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559634650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:25,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:25,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:13:25,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427957336] [2022-12-14 16:13:25,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:13:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:13:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:13:25,201 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 16:13:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:25,219 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-12-14 16:13:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:13:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-12-14 16:13:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:25,220 INFO L225 Difference]: With dead ends: 30 [2022-12-14 16:13:25,220 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 16:13:25,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:13:25,221 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:25,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 16:13:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 16:13:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 29 states have internal predecessors, (35), 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 16:13:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-14 16:13:25,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 9 [2022-12-14 16:13:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:25,223 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-14 16:13:25,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 16:13:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-14 16:13:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 16:13:25,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:25,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:25,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 16:13:25,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash -936929896, now seen corresponding path program 1 times [2022-12-14 16:13:25,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:25,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445563890] [2022-12-14 16:13:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:25,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:13:25,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:25,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445563890] [2022-12-14 16:13:25,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445563890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:25,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:25,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 16:13:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837447985] [2022-12-14 16:13:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:25,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:13:25,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:13:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:13:25,422 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:25,515 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 16:13:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:13:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 16:13:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:25,515 INFO L225 Difference]: With dead ends: 43 [2022-12-14 16:13:25,515 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 16:13:25,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:13:25,516 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:25,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 56 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 16:13:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-12-14 16:13:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 36 states have internal predecessors, (44), 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 16:13:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-12-14 16:13:25,519 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 11 [2022-12-14 16:13:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:25,519 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-12-14 16:13:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-12-14 16:13:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 16:13:25,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:25,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:25,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 16:13:25,520 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash -928260867, now seen corresponding path program 1 times [2022-12-14 16:13:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130372981] [2022-12-14 16:13:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:25,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,624 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 16:13:25,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:25,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130372981] [2022-12-14 16:13:25,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130372981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:25,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:13:25,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:13:25,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592017186] [2022-12-14 16:13:25,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:13:25,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:25,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:13:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:25,626 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:25,647 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-12-14 16:13:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:13:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 16:13:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:25,648 INFO L225 Difference]: With dead ends: 36 [2022-12-14 16:13:25,648 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 16:13:25,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:13:25,648 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:25,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:13:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 16:13:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 16:13:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 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 16:13:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 16:13:25,650 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2022-12-14 16:13:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:25,651 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 16:13:25,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 16:13:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 16:13:25,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:25,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:25,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 16:13:25,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash -764840503, now seen corresponding path program 1 times [2022-12-14 16:13:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:25,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739523722] [2022-12-14 16:13:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,779 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 16:13:25,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:25,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739523722] [2022-12-14 16:13:25,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739523722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:25,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650611003] [2022-12-14 16:13:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:25,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:25,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:25,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:13:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 16:13:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:25,903 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 16:13:25,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:25,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:13:25,995 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 16:13:25,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650611003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:25,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914287911] [2022-12-14 16:13:25,998 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 16:13:25,998 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:25,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:25,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:25,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:26,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:26,069 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 14 treesize of output 10 [2022-12-14 16:13:26,102 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 14 treesize of output 10 [2022-12-14 16:13:26,121 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 14 treesize of output 10 [2022-12-14 16:13:26,153 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:26,154 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 25 treesize of output 24 [2022-12-14 16:13:26,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:27,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1914287911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:27,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:27,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6, 6] total 25 [2022-12-14 16:13:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200177041] [2022-12-14 16:13:27,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:27,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 16:13:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:27,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 16:13:27,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-12-14 16:13:27,489 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 16:13:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:27,592 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-12-14 16:13:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 16:13:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 13 [2022-12-14 16:13:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:27,592 INFO L225 Difference]: With dead ends: 35 [2022-12-14 16:13:27,592 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 16:13:27,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-12-14 16:13:27,593 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:27,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 36 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 16:13:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-14 16:13:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 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 16:13:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-12-14 16:13:27,594 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 13 [2022-12-14 16:13:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:27,595 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-12-14 16:13:27,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 16:13:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-12-14 16:13:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 16:13:27,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:27,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:27,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 16:13:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:27,796 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1120431230, now seen corresponding path program 1 times [2022-12-14 16:13:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:27,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665519071] [2022-12-14 16:13:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:27,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:27,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665519071] [2022-12-14 16:13:27,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665519071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784944266] [2022-12-14 16:13:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:27,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:27,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:13:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 16:13:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:28,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:28,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:13:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:28,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784944266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:28,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999180398] [2022-12-14 16:13:28,115 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:28,115 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:28,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:28,116 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:28,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:28,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:28,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:28,203 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 14 treesize of output 10 [2022-12-14 16:13:28,238 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 14 treesize of output 10 [2022-12-14 16:13:28,276 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 14 treesize of output 10 [2022-12-14 16:13:28,312 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 14 treesize of output 10 [2022-12-14 16:13:28,348 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 14 treesize of output 10 [2022-12-14 16:13:28,386 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:28,386 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 25 treesize of output 24 [2022-12-14 16:13:28,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:29,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1589#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:29,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:29,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:29,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-12-14 16:13:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848868606] [2022-12-14 16:13:29,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:29,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 16:13:29,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 16:13:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-12-14 16:13:29,703 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 16:13:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:29,833 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-12-14 16:13:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 16:13:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 15 [2022-12-14 16:13:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:29,833 INFO L225 Difference]: With dead ends: 36 [2022-12-14 16:13:29,834 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 16:13:29,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 16:13:29,834 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 144 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:29,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 29 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 16:13:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-12-14 16:13:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 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 16:13:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 16:13:29,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2022-12-14 16:13:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:29,836 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 16:13:29,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 16:13:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 16:13:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 16:13:29,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:29,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:29,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:13:30,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 16:13:30,038 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1720400156, now seen corresponding path program 1 times [2022-12-14 16:13:30,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:30,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753782107] [2022-12-14 16:13:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:30,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:30,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753782107] [2022-12-14 16:13:30,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753782107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997158374] [2022-12-14 16:13:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:30,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:30,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:13:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 16:13:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:30,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:13:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:30,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997158374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:30,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152651219] [2022-12-14 16:13:30,388 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:30,388 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:30,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:30,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:30,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:30,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:30,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:30,475 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 14 treesize of output 10 [2022-12-14 16:13:30,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:30,539 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 14 treesize of output 10 [2022-12-14 16:13:30,576 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 14 treesize of output 10 [2022-12-14 16:13:30,629 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:30,629 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 25 treesize of output 24 [2022-12-14 16:13:30,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:31,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1789#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:31,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:31,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:31,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-14 16:13:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029955049] [2022-12-14 16:13:31,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:31,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 16:13:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 16:13:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-12-14 16:13:31,737 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 16:13:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:31,828 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-12-14 16:13:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 16:13:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 18 [2022-12-14 16:13:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:31,828 INFO L225 Difference]: With dead ends: 36 [2022-12-14 16:13:31,829 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 16:13:31,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-12-14 16:13:31,830 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:31,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 41 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 16:13:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-12-14 16:13:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 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 16:13:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-14 16:13:31,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2022-12-14 16:13:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:31,832 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-14 16:13:31,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 16:13:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-14 16:13:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 16:13:31,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:31,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:31,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 16:13:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 16:13:32,034 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash -257821811, now seen corresponding path program 2 times [2022-12-14 16:13:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:32,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461100927] [2022-12-14 16:13:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:32,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:32,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461100927] [2022-12-14 16:13:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461100927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547251842] [2022-12-14 16:13:32,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:13:32,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:32,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:32,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:32,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:13:32,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:13:32,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 16:13:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:32,476 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 13 treesize of output 9 [2022-12-14 16:13:32,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:13:32,743 INFO L321 Elim1Store]: treesize reduction 17, result has 43.3 percent of original size [2022-12-14 16:13:32,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 16:13:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:32,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:32,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:13:32,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:13:32,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-12-14 16:13:32,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:13:32,998 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 51 treesize of output 51 [2022-12-14 16:13:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:13:33,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547251842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:33,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752542532] [2022-12-14 16:13:33,178 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:33,178 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:33,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:33,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:33,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:33,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:33,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:33,270 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 14 treesize of output 10 [2022-12-14 16:13:33,307 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 14 treesize of output 10 [2022-12-14 16:13:33,331 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 14 treesize of output 10 [2022-12-14 16:13:33,366 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 14 treesize of output 10 [2022-12-14 16:13:33,395 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 14 treesize of output 10 [2022-12-14 16:13:33,435 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:33,435 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 25 treesize of output 24 [2022-12-14 16:13:33,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:34,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2019#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:34,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:34,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:34,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 31 [2022-12-14 16:13:34,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342082518] [2022-12-14 16:13:34,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 16:13:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 16:13:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 16:13:34,963 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 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 16:13:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:35,794 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-12-14 16:13:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 16:13:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 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 20 [2022-12-14 16:13:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:35,795 INFO L225 Difference]: With dead ends: 71 [2022-12-14 16:13:35,795 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 16:13:35,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=610, Invalid=4082, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 16:13:35,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:35,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 69 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:13:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 16:13:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-12-14 16:13:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 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 16:13:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-12-14 16:13:35,799 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2022-12-14 16:13:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:35,799 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-12-14 16:13:35,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 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 16:13:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-12-14 16:13:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 16:13:35,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:35,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:35,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 16:13:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:36,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash 313879267, now seen corresponding path program 3 times [2022-12-14 16:13:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:36,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571070072] [2022-12-14 16:13:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:36,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:36,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571070072] [2022-12-14 16:13:36,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571070072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915532346] [2022-12-14 16:13:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:13:36,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:36,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:36,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:13:36,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:13:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 16:13:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:36,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:36,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:13:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:36,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915532346] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161175087] [2022-12-14 16:13:36,448 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:36,449 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:36,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:36,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:36,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:36,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:36,492 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 14 treesize of output 10 [2022-12-14 16:13:36,520 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 14 treesize of output 10 [2022-12-14 16:13:36,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:36,579 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 16:13:36,579 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 84 treesize of output 83 [2022-12-14 16:13:36,616 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 14 treesize of output 10 [2022-12-14 16:13:36,632 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 14 treesize of output 10 [2022-12-14 16:13:36,655 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:36,656 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 25 treesize of output 24 [2022-12-14 16:13:36,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:38,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2344#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:38,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:38,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:38,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-12-14 16:13:38,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966796478] [2022-12-14 16:13:38,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 16:13:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 16:13:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-12-14 16:13:38,716 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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 16:13:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:38,871 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-12-14 16:13:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 16:13:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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 24 [2022-12-14 16:13:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:38,872 INFO L225 Difference]: With dead ends: 44 [2022-12-14 16:13:38,872 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 16:13:38,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 16:13:38,873 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:38,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 39 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 16:13:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2022-12-14 16:13:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 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 16:13:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-12-14 16:13:38,874 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2022-12-14 16:13:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:38,874 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-12-14 16:13:38,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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 16:13:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-12-14 16:13:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 16:13:38,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:38,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:38,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 16:13:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:39,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash 634788379, now seen corresponding path program 2 times [2022-12-14 16:13:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240963018] [2022-12-14 16:13:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:39,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:39,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:39,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240963018] [2022-12-14 16:13:39,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240963018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:39,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981595985] [2022-12-14 16:13:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:13:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:39,281 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:39,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 16:13:39,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:13:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:39,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:13:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:39,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:39,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 16:13:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:39,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981595985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:39,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1257628582] [2022-12-14 16:13:39,538 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:39,538 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:39,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:39,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:39,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:39,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:39,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:39,606 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 14 treesize of output 10 [2022-12-14 16:13:39,645 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 14 treesize of output 10 [2022-12-14 16:13:39,671 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 14 treesize of output 10 [2022-12-14 16:13:39,704 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 14 treesize of output 10 [2022-12-14 16:13:39,725 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 14 treesize of output 10 [2022-12-14 16:13:39,765 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:39,766 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 25 treesize of output 24 [2022-12-14 16:13:39,906 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:40,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2623#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:40,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:40,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:40,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-12-14 16:13:40,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119367621] [2022-12-14 16:13:40,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 16:13:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 16:13:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-12-14 16:13:40,725 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 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 16:13:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:40,885 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-12-14 16:13:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 16:13:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 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) Word has length 27 [2022-12-14 16:13:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:40,886 INFO L225 Difference]: With dead ends: 42 [2022-12-14 16:13:40,886 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 16:13:40,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 16:13:40,887 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:40,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 33 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 16:13:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-12-14 16:13:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 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 16:13:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-12-14 16:13:40,888 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2022-12-14 16:13:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:40,888 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-12-14 16:13:40,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 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 16:13:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-12-14 16:13:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 16:13:40,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:40,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:40,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 16:13:41,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 16:13:41,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash 146313420, now seen corresponding path program 4 times [2022-12-14 16:13:41,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:41,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189478875] [2022-12-14 16:13:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:41,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:41,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:41,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189478875] [2022-12-14 16:13:41,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189478875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:41,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476972870] [2022-12-14 16:13:41,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:13:41,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:41,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:41,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:41,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 16:13:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 16:13:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:41,562 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 14 treesize of output 10 [2022-12-14 16:13:41,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:13:41,935 INFO L321 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2022-12-14 16:13:41,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 37 [2022-12-14 16:13:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:41,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:42,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:13:42,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:13:42,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-12-14 16:13:42,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:13:42,203 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 51 treesize of output 51 [2022-12-14 16:13:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:13:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476972870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301268275] [2022-12-14 16:13:42,435 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:42,435 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:42,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:42,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:42,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:42,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:42,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:42,520 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 14 treesize of output 10 [2022-12-14 16:13:42,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:42,581 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 14 treesize of output 10 [2022-12-14 16:13:42,607 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 14 treesize of output 10 [2022-12-14 16:13:42,637 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:42,637 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 25 treesize of output 24 [2022-12-14 16:13:42,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:43,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2929#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:43,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:43,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:43,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 36 [2022-12-14 16:13:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252411290] [2022-12-14 16:13:43,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 16:13:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 16:13:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 16:13:43,865 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 16:13:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:45,371 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-12-14 16:13:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 16:13:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 29 [2022-12-14 16:13:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:45,372 INFO L225 Difference]: With dead ends: 97 [2022-12-14 16:13:45,372 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 16:13:45,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=646, Invalid=6160, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 16:13:45,373 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 244 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:45,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 124 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:13:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 16:13:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-12-14 16:13:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 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 16:13:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-14 16:13:45,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 29 [2022-12-14 16:13:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:45,375 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-14 16:13:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 16:13:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-14 16:13:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 16:13:45,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:45,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:45,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 16:13:45,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:45,577 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1315320778, now seen corresponding path program 5 times [2022-12-14 16:13:45,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:45,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856062732] [2022-12-14 16:13:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:45,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:45,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:45,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856062732] [2022-12-14 16:13:45,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856062732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:45,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365110540] [2022-12-14 16:13:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:13:45,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:45,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:45,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:45,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 16:13:45,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 16:13:45,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 16:13:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:46,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:46,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 16:13:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:46,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365110540] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:46,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966149730] [2022-12-14 16:13:46,148 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:46,149 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:46,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:46,149 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:46,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:46,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:46,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:46,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:46,229 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 14 treesize of output 10 [2022-12-14 16:13:46,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:46,281 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 14 treesize of output 10 [2022-12-14 16:13:46,305 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 14 treesize of output 10 [2022-12-14 16:13:46,333 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:46,333 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 25 treesize of output 24 [2022-12-14 16:13:46,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:47,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3368#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:47,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:47,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:47,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-14 16:13:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190020936] [2022-12-14 16:13:47,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:47,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 16:13:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 16:13:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 16:13:47,545 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 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 16:13:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:47,715 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-12-14 16:13:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 16:13:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 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 16:13:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:47,716 INFO L225 Difference]: With dead ends: 53 [2022-12-14 16:13:47,716 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 16:13:47,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 16:13:47,717 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 298 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:47,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 46 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 16:13:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-12-14 16:13:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 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 16:13:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-12-14 16:13:47,718 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2022-12-14 16:13:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:47,718 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-12-14 16:13:47,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 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 16:13:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-12-14 16:13:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 16:13:47,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:47,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:47,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 16:13:47,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:47,920 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1733307416, now seen corresponding path program 3 times [2022-12-14 16:13:47,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:47,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082767172] [2022-12-14 16:13:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:48,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082767172] [2022-12-14 16:13:48,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082767172] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405861860] [2022-12-14 16:13:48,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:13:48,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:48,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:48,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:48,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 16:13:48,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:13:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:48,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 16:13:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:48,241 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:13:48,242 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 16:13:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:48,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:48,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405861860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277530149] [2022-12-14 16:13:48,449 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:48,449 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:48,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:48,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:48,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:48,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:48,483 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 14 treesize of output 10 [2022-12-14 16:13:48,508 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 14 treesize of output 10 [2022-12-14 16:13:48,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:48,557 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 16:13:48,557 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 84 treesize of output 83 [2022-12-14 16:13:48,594 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 14 treesize of output 10 [2022-12-14 16:13:48,604 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 14 treesize of output 10 [2022-12-14 16:13:48,627 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:48,627 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 25 treesize of output 24 [2022-12-14 16:13:48,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:50,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3726#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:50,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:50,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-14 16:13:50,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931080570] [2022-12-14 16:13:50,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 16:13:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:50,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 16:13:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 16:13:50,651 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 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 16:13:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:50,816 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-12-14 16:13:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 16:13:50,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 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 36 [2022-12-14 16:13:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:50,816 INFO L225 Difference]: With dead ends: 51 [2022-12-14 16:13:50,817 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 16:13:50,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 16:13:50,817 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 226 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:50,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 52 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:13:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 16:13:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-12-14 16:13:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 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 16:13:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-12-14 16:13:50,819 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2022-12-14 16:13:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:50,819 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-12-14 16:13:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 26 states have internal predecessors, (79), 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 16:13:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-12-14 16:13:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 16:13:50,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:50,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:50,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 16:13:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 16:13:51,021 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash 738921305, now seen corresponding path program 6 times [2022-12-14 16:13:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:51,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963703486] [2022-12-14 16:13:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:51,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963703486] [2022-12-14 16:13:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963703486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301065806] [2022-12-14 16:13:51,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:13:51,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:51,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:51,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 16:13:51,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:13:51,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:13:51,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 16:13:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:51,550 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 14 treesize of output 10 [2022-12-14 16:13:51,915 INFO L321 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2022-12-14 16:13:51,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2022-12-14 16:13:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:51,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:52,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:13:52,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:13:52,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-12-14 16:13:52,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:13:52,236 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 39 treesize of output 39 [2022-12-14 16:13:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 16:13:52,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301065806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551264631] [2022-12-14 16:13:52,342 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:52,342 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:52,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:52,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:52,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:52,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:52,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:52,407 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 14 treesize of output 10 [2022-12-14 16:13:52,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:52,461 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 14 treesize of output 10 [2022-12-14 16:13:52,481 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 14 treesize of output 10 [2022-12-14 16:13:52,514 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:52,514 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 25 treesize of output 24 [2022-12-14 16:13:52,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:54,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4106#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:54,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:54,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:54,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 36 [2022-12-14 16:13:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443261667] [2022-12-14 16:13:54,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 16:13:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 16:13:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2017, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 16:13:54,003 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:55,963 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2022-12-14 16:13:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 16:13:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 16:13:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:55,964 INFO L225 Difference]: With dead ends: 123 [2022-12-14 16:13:55,964 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 16:13:55,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=517, Invalid=5963, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 16:13:55,966 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 244 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:55,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 144 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:13:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 16:13:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-12-14 16:13:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 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 16:13:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-12-14 16:13:55,967 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 38 [2022-12-14 16:13:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:55,967 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-12-14 16:13:55,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 36 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-12-14 16:13:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 16:13:55,968 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:55,968 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:55,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 16:13:56,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 16:13:56,169 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 151123247, now seen corresponding path program 7 times [2022-12-14 16:13:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574753697] [2022-12-14 16:13:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:13:56,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574753697] [2022-12-14 16:13:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574753697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846846883] [2022-12-14 16:13:56,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:13:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:56,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:56,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 16:13:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 16:13:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:13:56,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:56,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:13:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:13:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846846883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:56,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458065151] [2022-12-14 16:13:56,832 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:56,832 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:56,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:56,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:56,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:56,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:56,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:56,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:56,907 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 14 treesize of output 10 [2022-12-14 16:13:56,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:56,959 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 14 treesize of output 10 [2022-12-14 16:13:56,987 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 14 treesize of output 10 [2022-12-14 16:13:57,013 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:57,014 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 25 treesize of output 24 [2022-12-14 16:13:57,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:13:58,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4633#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:13:58,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:13:58,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:13:58,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-12-14 16:13:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887125677] [2022-12-14 16:13:58,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:13:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 16:13:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 16:13:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 16:13:58,127 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 16:13:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:58,387 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-12-14 16:13:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 16:13:58,388 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 42 [2022-12-14 16:13:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:58,388 INFO L225 Difference]: With dead ends: 62 [2022-12-14 16:13:58,388 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 16:13:58,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 16:13:58,389 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 296 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:58,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 68 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:13:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 16:13:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-12-14 16:13:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 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 16:13:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-12-14 16:13:58,391 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2022-12-14 16:13:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:58,392 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-12-14 16:13:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 16:13:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-12-14 16:13:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 16:13:58,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:58,392 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:58,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 16:13:58,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:58,593 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:13:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:58,594 INFO L85 PathProgramCache]: Analyzing trace with hash 988273743, now seen corresponding path program 4 times [2022-12-14 16:13:58,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:58,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768621740] [2022-12-14 16:13:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:58,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:13:58,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:58,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768621740] [2022-12-14 16:13:58,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768621740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:58,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805993243] [2022-12-14 16:13:58,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:13:58,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:58,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:58,840 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:58,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 16:13:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 16:13:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:13:59,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:59,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:13:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:13:59,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805993243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:13:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284845236] [2022-12-14 16:13:59,140 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:13:59,140 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:13:59,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:13:59,141 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:13:59,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:13:59,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:13:59,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:13:59,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:13:59,210 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 14 treesize of output 10 [2022-12-14 16:13:59,240 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 14 treesize of output 10 [2022-12-14 16:13:59,276 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 14 treesize of output 10 [2022-12-14 16:13:59,299 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 14 treesize of output 10 [2022-12-14 16:13:59,321 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 14 treesize of output 10 [2022-12-14 16:13:59,352 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:13:59,352 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 25 treesize of output 24 [2022-12-14 16:13:59,522 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:14:00,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5065#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.offset|) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:14:00,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:14:00,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:14:00,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 25 [2022-12-14 16:14:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638526532] [2022-12-14 16:14:00,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:14:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 16:14:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:14:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 16:14:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 16:14:00,908 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 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 16:14:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:14:01,105 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-12-14 16:14:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 16:14:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 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 45 [2022-12-14 16:14:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:14:01,106 INFO L225 Difference]: With dead ends: 60 [2022-12-14 16:14:01,106 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 16:14:01,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 16:14:01,107 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:14:01,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:14:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 16:14:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-12-14 16:14:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 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 16:14:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-12-14 16:14:01,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2022-12-14 16:14:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:14:01,108 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-12-14 16:14:01,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 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 16:14:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-12-14 16:14:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 16:14:01,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:14:01,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 16:14:01,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 16:14:01,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 16:14:01,310 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:14:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:14:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 543331840, now seen corresponding path program 8 times [2022-12-14 16:14:01,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:14:01,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104382990] [2022-12-14 16:14:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:14:01,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:14:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:14:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:14:01,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:14:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104382990] [2022-12-14 16:14:01,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104382990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:14:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731456395] [2022-12-14 16:14:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:14:01,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:14:01,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:14:01,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:14:01,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 16:14:01,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 16:14:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:14:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 16:14:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:14:01,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 16:14:02,029 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 14 treesize of output 10 [2022-12-14 16:14:02,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 16:14:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:14:02,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:14:02,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:02,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 16:14:02,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:02,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 16:14:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:14:02,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731456395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:14:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346029736] [2022-12-14 16:14:02,375 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:14:02,376 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:14:02,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:14:02,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:14:02,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:14:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:14:02,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:14:02,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:14:02,449 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 14 treesize of output 10 [2022-12-14 16:14:02,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:14:02,515 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 14 treesize of output 10 [2022-12-14 16:14:02,542 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 14 treesize of output 10 [2022-12-14 16:14:02,573 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:14:02,573 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 25 treesize of output 24 [2022-12-14 16:14:02,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:14:03,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5511#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:14:03,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:14:03,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:14:03,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-12-14 16:14:03,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215741978] [2022-12-14 16:14:03,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:14:03,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 16:14:03,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:14:03,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 16:14:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1426, Unknown=4, NotChecked=0, Total=1560 [2022-12-14 16:14:03,707 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 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 16:14:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:14:04,159 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-12-14 16:14:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 16:14:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 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 47 [2022-12-14 16:14:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:14:04,160 INFO L225 Difference]: With dead ends: 92 [2022-12-14 16:14:04,160 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 16:14:04,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=263, Invalid=2385, Unknown=4, NotChecked=0, Total=2652 [2022-12-14 16:14:04,161 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 118 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:14:04,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 147 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:14:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 16:14:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-12-14 16:14:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 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 16:14:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-12-14 16:14:04,163 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2022-12-14 16:14:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:14:04,164 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-12-14 16:14:04,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 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 16:14:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-12-14 16:14:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 16:14:04,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:14:04,164 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 16:14:04,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 16:14:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 16:14:04,366 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:14:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:14:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2052321713, now seen corresponding path program 9 times [2022-12-14 16:14:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:14:04,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435667206] [2022-12-14 16:14:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:14:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:14:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:14:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:14:04,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:14:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435667206] [2022-12-14 16:14:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435667206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:14:04,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923391495] [2022-12-14 16:14:04,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:14:04,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:14:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:14:04,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:14:04,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 16:14:04,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:14:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:14:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 16:14:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:14:04,834 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 14 treesize of output 10 [2022-12-14 16:14:06,764 INFO L321 Elim1Store]: treesize reduction 131, result has 66.0 percent of original size [2022-12-14 16:14:06,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 295 [2022-12-14 16:14:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:14:07,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:14:08,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:08,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 377 treesize of output 425 [2022-12-14 16:14:08,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:09,206 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 102 treesize of output 102 [2022-12-14 16:14:09,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:09,773 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 83 treesize of output 83 [2022-12-14 16:14:09,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:09,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:09,990 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 138 treesize of output 138 [2022-12-14 16:14:10,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:10,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:10,345 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 83 treesize of output 83 [2022-12-14 16:14:10,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 16:14:10,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:10,523 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 83 treesize of output 83 [2022-12-14 16:14:10,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:10,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 116 [2022-12-14 16:14:10,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:10,824 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 83 treesize of output 83 [2022-12-14 16:14:11,741 INFO L321 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-12-14 16:14:11,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 311 [2022-12-14 16:14:13,991 INFO L321 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2022-12-14 16:14:13,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 142 treesize of output 146 [2022-12-14 16:14:14,276 INFO L321 Elim1Store]: treesize reduction 20, result has 86.2 percent of original size [2022-12-14 16:14:14,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 236 treesize of output 314 [2022-12-14 16:14:19,471 INFO L321 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-12-14 16:14:19,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 188 treesize of output 230 [2022-12-14 16:14:20,706 INFO L321 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2022-12-14 16:14:20,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 153 treesize of output 157 [2022-12-14 16:14:21,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 150 [2022-12-14 16:14:21,407 INFO L321 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2022-12-14 16:14:21,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 561 treesize of output 1 [2022-12-14 16:14:21,688 INFO L321 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-12-14 16:14:21,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 451 treesize of output 443 [2022-12-14 16:14:28,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 142 [2022-12-14 16:14:28,883 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-12-14 16:14:28,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 1 [2022-12-14 16:14:29,500 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-12-14 16:14:29,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 346 treesize of output 1 [2022-12-14 16:14:29,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 117 [2022-12-14 16:14:29,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:29,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 180 treesize of output 190 [2022-12-14 16:14:30,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-12-14 16:14:30,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:14:30,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 3311 treesize of output 2825 [2022-12-14 16:26:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:19,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923391495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2056429428] [2022-12-14 16:26:19,545 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:19,546 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:19,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:19,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:19,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:19,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:19,589 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 14 treesize of output 10 [2022-12-14 16:26:19,613 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 14 treesize of output 10 [2022-12-14 16:26:19,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:19,665 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 16:26:19,666 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 84 treesize of output 83 [2022-12-14 16:26:19,695 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 14 treesize of output 10 [2022-12-14 16:26:19,708 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 14 treesize of output 10 [2022-12-14 16:26:19,730 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:19,731 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 25 treesize of output 24 [2022-12-14 16:26:20,005 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:26:23,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6054#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:26:23,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:26:23,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:26:23,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 30, 30] total 70 [2022-12-14 16:26:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733449902] [2022-12-14 16:26:23,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:26:23,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 16:26:23,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:26:23,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 16:26:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 16:26:23,321 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 70 states have internal predecessors, (120), 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 16:26:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:26:27,123 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2022-12-14 16:26:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 16:26:27,124 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 70 states have internal predecessors, (120), 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 49 [2022-12-14 16:26:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:26:27,124 INFO L225 Difference]: With dead ends: 99 [2022-12-14 16:26:27,124 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 16:26:27,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1467, Invalid=13539, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 16:26:27,126 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 555 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:26:27,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 103 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 16:26:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 16:26:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-12-14 16:26:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 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 16:26:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-12-14 16:26:27,127 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 49 [2022-12-14 16:26:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:26:27,127 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-12-14 16:26:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 70 states have internal predecessors, (120), 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 16:26:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-12-14 16:26:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 16:26:27,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:26:27,128 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 16:26:27,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 16:26:27,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 16:26:27,329 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:26:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:26:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1216969548, now seen corresponding path program 5 times [2022-12-14 16:26:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:26:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106272069] [2022-12-14 16:26:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:26:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:26:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:27,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:26:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106272069] [2022-12-14 16:26:27,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106272069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:26:27,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250216928] [2022-12-14 16:26:27,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:26:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:26:27,765 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:26:27,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 16:26:27,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 16:26:27,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:26:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 16:26:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:26:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:28,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:26:28,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 16:26:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:28,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250216928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:28,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737159053] [2022-12-14 16:26:28,395 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:28,395 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:28,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:28,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:28,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:28,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:28,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:28,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:28,498 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 14 treesize of output 10 [2022-12-14 16:26:28,540 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 14 treesize of output 10 [2022-12-14 16:26:28,585 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 14 treesize of output 10 [2022-12-14 16:26:28,624 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 14 treesize of output 10 [2022-12-14 16:26:28,662 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 14 treesize of output 10 [2022-12-14 16:26:28,709 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:28,709 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 25 treesize of output 24 [2022-12-14 16:26:28,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:26:30,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6663#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.offset|) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:26:30,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:26:30,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:26:30,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-12-14 16:26:30,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661059439] [2022-12-14 16:26:30,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:26:30,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 16:26:30,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:26:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 16:26:30,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 16:26:30,820 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 35 states, 34 states have (on average 3.588235294117647) internal successors, (122), 35 states have internal predecessors, (122), 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 16:26:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:26:31,070 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-12-14 16:26:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 16:26:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.588235294117647) internal successors, (122), 35 states have internal predecessors, (122), 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 54 [2022-12-14 16:26:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:26:31,071 INFO L225 Difference]: With dead ends: 69 [2022-12-14 16:26:31,071 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 16:26:31,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 16:26:31,072 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 195 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:26:31,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:26:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 16:26:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-12-14 16:26:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 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 16:26:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-12-14 16:26:31,074 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2022-12-14 16:26:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:26:31,074 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-12-14 16:26:31,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.588235294117647) internal successors, (122), 35 states have internal predecessors, (122), 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 16:26:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-12-14 16:26:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 16:26:31,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:26:31,074 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 16:26:31,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 16:26:31,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:31,275 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:26:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:26:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1276593883, now seen corresponding path program 10 times [2022-12-14 16:26:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:26:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895746638] [2022-12-14 16:26:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:26:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:26:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:31,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:26:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895746638] [2022-12-14 16:26:31,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895746638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:26:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562254593] [2022-12-14 16:26:31,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:26:31,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:31,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:26:31,789 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:26:31,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 16:26:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:31,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 16:26:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:26:32,015 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 14 treesize of output 10 [2022-12-14 16:26:32,563 INFO L321 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2022-12-14 16:26:32,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2022-12-14 16:26:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:32,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:26:33,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:26:33,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:26:33,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-12-14 16:26:33,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:26:33,052 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 39 treesize of output 39 [2022-12-14 16:26:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:26:33,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562254593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:33,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301368035] [2022-12-14 16:26:33,192 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:33,192 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:33,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:33,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:33,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:33,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:33,243 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 14 treesize of output 10 [2022-12-14 16:26:33,265 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 14 treesize of output 10 [2022-12-14 16:26:33,283 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 14 treesize of output 10 [2022-12-14 16:26:33,313 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 85 treesize of output 77 [2022-12-14 16:26:33,341 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 14 treesize of output 10 [2022-12-14 16:26:33,359 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 14 treesize of output 10 [2022-12-14 16:26:33,387 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:33,387 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 25 treesize of output 24 [2022-12-14 16:26:33,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:26:36,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7200#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:26:36,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:26:36,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:26:36,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 46 [2022-12-14 16:26:36,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38582154] [2022-12-14 16:26:36,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:26:36,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 16:26:36,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:26:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 16:26:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3130, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 16:26:36,523 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 46 states, 46 states have (on average 2.782608695652174) internal successors, (128), 46 states have internal predecessors, (128), 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 16:26:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:26:39,451 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2022-12-14 16:26:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 16:26:39,452 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.782608695652174) internal successors, (128), 46 states have internal predecessors, (128), 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 56 [2022-12-14 16:26:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:26:39,452 INFO L225 Difference]: With dead ends: 175 [2022-12-14 16:26:39,452 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 16:26:39,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=664, Invalid=10048, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 16:26:39,453 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 313 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:26:39,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 282 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 16:26:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 16:26:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-12-14 16:26:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 68 states have internal predecessors, (71), 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 16:26:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-12-14 16:26:39,455 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2022-12-14 16:26:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:26:39,455 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-12-14 16:26:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.782608695652174) internal successors, (128), 46 states have internal predecessors, (128), 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 16:26:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-12-14 16:26:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 16:26:39,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:26:39,456 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 16:26:39,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 16:26:39,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:39,657 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:26:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:26:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1586858629, now seen corresponding path program 11 times [2022-12-14 16:26:39,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:26:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327819133] [2022-12-14 16:26:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:26:39,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:26:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:40,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:26:40,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327819133] [2022-12-14 16:26:40,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327819133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:26:40,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854992205] [2022-12-14 16:26:40,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:26:40,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:40,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:26:40,060 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:26:40,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 16:26:40,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 16:26:40,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:26:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 16:26:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:26:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:40,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:26:40,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 16:26:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:40,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854992205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:40,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255530701] [2022-12-14 16:26:40,967 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:40,967 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:40,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:40,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:40,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:40,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:41,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:41,035 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 14 treesize of output 10 [2022-12-14 16:26:41,065 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 14 treesize of output 10 [2022-12-14 16:26:41,092 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 14 treesize of output 10 [2022-12-14 16:26:41,123 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 14 treesize of output 10 [2022-12-14 16:26:41,153 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 14 treesize of output 10 [2022-12-14 16:26:41,191 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:41,192 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 25 treesize of output 24 [2022-12-14 16:26:41,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:26:43,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7944#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:26:43,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:26:43,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:26:43,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2022-12-14 16:26:43,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920180527] [2022-12-14 16:26:43,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:26:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 16:26:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:26:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 16:26:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 16:26:43,050 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 42 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 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 16:26:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:26:43,352 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-12-14 16:26:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 16:26:43,352 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 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 60 [2022-12-14 16:26:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:26:43,353 INFO L225 Difference]: With dead ends: 80 [2022-12-14 16:26:43,353 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 16:26:43,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 129 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=592, Invalid=3314, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 16:26:43,354 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 303 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:26:43,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 69 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:26:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 16:26:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2022-12-14 16:26:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 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 16:26:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-12-14 16:26:43,356 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 60 [2022-12-14 16:26:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:26:43,356 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-12-14 16:26:43,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 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 16:26:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-12-14 16:26:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 16:26:43,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:26:43,357 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 16:26:43,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 16:26:43,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 16:26:43,558 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:26:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:26:43,559 INFO L85 PathProgramCache]: Analyzing trace with hash 600959107, now seen corresponding path program 6 times [2022-12-14 16:26:43,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:26:43,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074556400] [2022-12-14 16:26:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:26:43,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:26:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 119 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:43,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:26:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074556400] [2022-12-14 16:26:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074556400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:26:43,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437016181] [2022-12-14 16:26:43,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:26:43,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:43,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:26:43,988 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:26:43,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 16:26:44,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:26:44,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:26:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 16:26:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:26:44,136 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:26:44,137 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 16:26:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:26:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:44,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437016181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720300641] [2022-12-14 16:26:44,690 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:44,690 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:44,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:44,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:44,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:44,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:44,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:44,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:44,772 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 14 treesize of output 10 [2022-12-14 16:26:44,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:44,850 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 14 treesize of output 10 [2022-12-14 16:26:44,888 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 14 treesize of output 10 [2022-12-14 16:26:44,924 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:44,925 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 25 treesize of output 24 [2022-12-14 16:26:45,195 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:26:46,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8539#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:26:46,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:26:46,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:26:46,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2022-12-14 16:26:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729416108] [2022-12-14 16:26:46,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:26:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 16:26:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:26:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 16:26:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2351, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:26:46,476 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 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 16:26:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:26:46,899 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-12-14 16:26:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 16:26:46,899 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 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 63 [2022-12-14 16:26:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:26:46,900 INFO L225 Difference]: With dead ends: 78 [2022-12-14 16:26:46,900 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 16:26:46,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 16:26:46,900 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 364 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:26:46,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 104 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:26:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 16:26:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-12-14 16:26:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 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 16:26:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-12-14 16:26:46,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 63 [2022-12-14 16:26:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:26:46,902 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-12-14 16:26:46,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 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 16:26:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-12-14 16:26:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 16:26:46,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:26:46,903 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 16:26:46,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 16:26:47,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:47,104 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:26:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:26:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1996121396, now seen corresponding path program 12 times [2022-12-14 16:26:47,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:26:47,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120846186] [2022-12-14 16:26:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:26:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:26:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 25 proven. 123 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:47,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:26:47,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120846186] [2022-12-14 16:26:47,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120846186] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:26:47,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862697899] [2022-12-14 16:26:47,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:26:47,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:47,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:26:47,655 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:26:47,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 16:26:47,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:26:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:26:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 16:26:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:26:47,964 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 14 treesize of output 10 [2022-12-14 16:26:48,562 INFO L321 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2022-12-14 16:26:48,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2022-12-14 16:26:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:48,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:26:49,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:26:49,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:26:49,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-12-14 16:26:49,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:26:49,195 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 39 treesize of output 39 [2022-12-14 16:26:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 7 proven. 141 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 16:26:49,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862697899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093082355] [2022-12-14 16:26:49,364 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:49,364 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:49,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:49,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:49,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:49,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:49,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:49,441 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 14 treesize of output 10 [2022-12-14 16:26:49,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:49,506 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 14 treesize of output 10 [2022-12-14 16:26:49,529 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 14 treesize of output 10 [2022-12-14 16:26:49,573 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:49,574 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 25 treesize of output 24 [2022-12-14 16:26:49,719 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:26:51,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9155#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:26:51,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:26:51,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:26:51,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 51 [2022-12-14 16:26:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584931157] [2022-12-14 16:26:51,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:26:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 16:26:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:26:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 16:26:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 16:26:51,754 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 51 states, 51 states have (on average 2.8823529411764706) internal successors, (147), 51 states have internal predecessors, (147), 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 16:26:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:26:55,707 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2022-12-14 16:26:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 16:26:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.8823529411764706) internal successors, (147), 51 states have internal predecessors, (147), 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 65 [2022-12-14 16:26:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:26:55,708 INFO L225 Difference]: With dead ends: 201 [2022-12-14 16:26:55,708 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 16:26:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=727, Invalid=12155, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 16:26:55,709 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 499 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:26:55,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 330 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 16:26:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 16:26:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-12-14 16:26:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:26:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-12-14 16:26:55,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 65 [2022-12-14 16:26:55,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:26:55,712 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-12-14 16:26:55,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.8823529411764706) internal successors, (147), 51 states have internal predecessors, (147), 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 16:26:55,712 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-12-14 16:26:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 16:26:55,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:26:55,713 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 16:26:55,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 16:26:55,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:55,914 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:26:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:26:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1444674462, now seen corresponding path program 13 times [2022-12-14 16:26:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:26:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730573575] [2022-12-14 16:26:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:26:55,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:26:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 25 proven. 136 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:26:56,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:26:56,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730573575] [2022-12-14 16:26:56,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730573575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:26:56,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893806913] [2022-12-14 16:26:56,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:26:56,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:26:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:26:56,331 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:26:56,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 16:26:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:26:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 16:26:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:26:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:26:56,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:26:56,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:26:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:26:57,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893806913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:26:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929422593] [2022-12-14 16:26:57,040 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:26:57,040 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:26:57,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:26:57,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:26:57,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:26:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:26:57,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:26:57,076 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 14 treesize of output 10 [2022-12-14 16:26:57,108 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 14 treesize of output 10 [2022-12-14 16:26:57,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:26:57,189 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 16:26:57,189 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 84 treesize of output 83 [2022-12-14 16:26:57,229 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 14 treesize of output 10 [2022-12-14 16:26:57,243 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 14 treesize of output 10 [2022-12-14 16:26:57,267 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:26:57,267 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 25 treesize of output 24 [2022-12-14 16:26:57,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:00,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9997#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:00,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:00,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:00,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 38 [2022-12-14 16:27:00,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589955316] [2022-12-14 16:27:00,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 16:27:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 16:27:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2387, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:27:00,266 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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 16:27:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:00,662 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-12-14 16:27:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 16:27:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 16:27:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:00,663 INFO L225 Difference]: With dead ends: 89 [2022-12-14 16:27:00,663 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 16:27:00,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=557, Invalid=3349, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 16:27:00,664 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:00,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 112 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:27:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 16:27:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-12-14 16:27:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 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 16:27:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-12-14 16:27:00,665 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 69 [2022-12-14 16:27:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:00,665 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-12-14 16:27:00,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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 16:27:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-12-14 16:27:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 16:27:00,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:00,666 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:00,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 16:27:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 16:27:00,867 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1569027200, now seen corresponding path program 7 times [2022-12-14 16:27:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794096402] [2022-12-14 16:27:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 25 proven. 157 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:27:01,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:01,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794096402] [2022-12-14 16:27:01,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794096402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688740690] [2022-12-14 16:27:01,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:27:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:01,419 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:01,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 16:27:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 16:27:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 36 proven. 146 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:27:01,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:27:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:27:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 36 proven. 146 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:27:02,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688740690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:27:02,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184896558] [2022-12-14 16:27:02,053 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:27:02,053 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:27:02,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:27:02,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:27:02,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:27:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:27:02,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:27:02,096 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 14 treesize of output 10 [2022-12-14 16:27:02,118 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 14 treesize of output 10 [2022-12-14 16:27:02,132 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 14 treesize of output 10 [2022-12-14 16:27:02,162 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 85 treesize of output 77 [2022-12-14 16:27:02,191 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 14 treesize of output 10 [2022-12-14 16:27:02,204 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 14 treesize of output 10 [2022-12-14 16:27:02,230 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:27:02,230 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 25 treesize of output 24 [2022-12-14 16:27:02,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:04,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10664#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:04,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:04,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:04,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2022-12-14 16:27:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193898747] [2022-12-14 16:27:04,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:04,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 16:27:04,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 16:27:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2188, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 16:27:04,296 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 38 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 38 states have internal predecessors, (126), 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 16:27:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:04,804 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2022-12-14 16:27:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 16:27:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 38 states have internal predecessors, (126), 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 72 [2022-12-14 16:27:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:04,804 INFO L225 Difference]: With dead ends: 87 [2022-12-14 16:27:04,804 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 16:27:04,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=507, Invalid=3033, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 16:27:04,805 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 233 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:04,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 133 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:27:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 16:27:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-12-14 16:27:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.0625) internal successors, (85), 82 states have internal predecessors, (85), 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 16:27:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-12-14 16:27:04,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2022-12-14 16:27:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:04,806 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-12-14 16:27:04,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 38 states have internal predecessors, (126), 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 16:27:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-12-14 16:27:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 16:27:04,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:04,810 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:04,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 16:27:05,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 16:27:05,011 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:05,013 INFO L85 PathProgramCache]: Analyzing trace with hash -301581071, now seen corresponding path program 14 times [2022-12-14 16:27:05,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:05,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486086283] [2022-12-14 16:27:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:05,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:27:05,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:05,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486086283] [2022-12-14 16:27:05,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486086283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623145825] [2022-12-14 16:27:05,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:27:05,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:05,723 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:05,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 16:27:06,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 16:27:06,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:27:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-14 16:27:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:06,605 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 14 treesize of output 10 [2022-12-14 16:27:07,465 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-12-14 16:27:07,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 37 [2022-12-14 16:27:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 8 proven. 189 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:27:07,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:27:08,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:27:08,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:27:08,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-12-14 16:27:08,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:27:08,299 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 39 treesize of output 39 [2022-12-14 16:27:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 8 proven. 189 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:27:08,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623145825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:27:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68159529] [2022-12-14 16:27:08,478 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:27:08,478 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:27:08,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:27:08,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:27:08,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:27:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:27:08,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:27:08,517 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 14 treesize of output 10 [2022-12-14 16:27:08,546 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 14 treesize of output 10 [2022-12-14 16:27:08,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:27:08,615 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 16:27:08,616 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 84 treesize of output 83 [2022-12-14 16:27:08,648 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 14 treesize of output 10 [2022-12-14 16:27:08,667 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 14 treesize of output 10 [2022-12-14 16:27:08,701 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:27:08,702 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 25 treesize of output 24 [2022-12-14 16:27:08,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:12,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11360#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:12,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:12,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:12,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 56 [2022-12-14 16:27:12,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235445649] [2022-12-14 16:27:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:12,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 16:27:12,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 16:27:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4356, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 16:27:12,263 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 56 states have internal predecessors, (166), 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 16:27:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:16,520 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2022-12-14 16:27:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-14 16:27:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 56 states have internal predecessors, (166), 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 74 [2022-12-14 16:27:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:16,521 INFO L225 Difference]: With dead ends: 227 [2022-12-14 16:27:16,521 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 16:27:16,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=804, Invalid=14946, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 16:27:16,522 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 495 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:16,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 408 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2843 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 16:27:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 16:27:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-12-14 16:27:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 86 states have internal predecessors, (89), 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 16:27:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-12-14 16:27:16,523 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 74 [2022-12-14 16:27:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:16,523 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-12-14 16:27:16,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 56 states have internal predecessors, (166), 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 16:27:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-12-14 16:27:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 16:27:16,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:16,524 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:16,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 16:27:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:16,725 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash 207760327, now seen corresponding path program 15 times [2022-12-14 16:27:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:16,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700977512] [2022-12-14 16:27:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 176 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:17,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700977512] [2022-12-14 16:27:17,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700977512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210243597] [2022-12-14 16:27:17,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:27:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:17,168 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:17,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 16:27:17,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:27:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:27:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 16:27:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:17,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:27:18,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 16:27:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:18,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210243597] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:27:18,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491584629] [2022-12-14 16:27:18,216 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:27:18,216 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:27:18,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:27:18,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:27:18,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:27:18,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:27:18,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:27:18,258 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 14 treesize of output 10 [2022-12-14 16:27:18,281 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 14 treesize of output 10 [2022-12-14 16:27:18,299 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 14 treesize of output 10 [2022-12-14 16:27:18,328 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 85 treesize of output 77 [2022-12-14 16:27:18,352 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 14 treesize of output 10 [2022-12-14 16:27:18,365 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 14 treesize of output 10 [2022-12-14 16:27:18,388 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:27:18,388 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 25 treesize of output 24 [2022-12-14 16:27:18,657 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:20,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12308#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:20,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:20,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:20,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 42 [2022-12-14 16:27:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356365591] [2022-12-14 16:27:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 16:27:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 16:27:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 16:27:20,765 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 states have internal predecessors, (135), 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 16:27:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:21,300 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-12-14 16:27:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 16:27:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 states have internal predecessors, (135), 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 78 [2022-12-14 16:27:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:21,300 INFO L225 Difference]: With dead ends: 98 [2022-12-14 16:27:21,300 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 16:27:21,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 188 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=653, Invalid=3903, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 16:27:21,301 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 415 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:21,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 148 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:27:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 16:27:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-12-14 16:27:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.058139534883721) internal successors, (91), 88 states have internal predecessors, (91), 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 16:27:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-12-14 16:27:21,302 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 78 [2022-12-14 16:27:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:21,302 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-12-14 16:27:21,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 states have internal predecessors, (135), 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 16:27:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-12-14 16:27:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 16:27:21,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:21,303 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:21,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 16:27:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 16:27:21,504 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash 341376695, now seen corresponding path program 8 times [2022-12-14 16:27:21,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:21,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765632307] [2022-12-14 16:27:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:21,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 200 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:22,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765632307] [2022-12-14 16:27:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765632307] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85933440] [2022-12-14 16:27:22,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:27:22,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:22,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:22,043 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:22,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 16:27:22,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 16:27:22,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:27:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 16:27:22,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 49 proven. 187 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:23,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:27:23,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 16:27:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 49 proven. 187 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:23,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85933440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:27:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174367734] [2022-12-14 16:27:23,618 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:27:23,618 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:27:23,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:27:23,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:27:23,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:27:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:27:23,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:27:23,653 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 14 treesize of output 10 [2022-12-14 16:27:23,677 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 14 treesize of output 10 [2022-12-14 16:27:23,690 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 14 treesize of output 10 [2022-12-14 16:27:23,717 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 85 treesize of output 77 [2022-12-14 16:27:23,740 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 14 treesize of output 10 [2022-12-14 16:27:23,754 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 14 treesize of output 10 [2022-12-14 16:27:23,775 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:27:23,775 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 25 treesize of output 24 [2022-12-14 16:27:24,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:25,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13061#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ |ULTIMATE.start_cstrcmp_~s2#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:25,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:25,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 49 [2022-12-14 16:27:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036413255] [2022-12-14 16:27:25,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:25,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 16:27:25,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 16:27:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=3310, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 16:27:25,989 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 50 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 50 states have internal predecessors, (179), 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 16:27:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:26,398 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-12-14 16:27:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 16:27:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 50 states have internal predecessors, (179), 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 81 [2022-12-14 16:27:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:26,399 INFO L225 Difference]: With dead ends: 96 [2022-12-14 16:27:26,399 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 16:27:26,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 191 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=826, Invalid=4430, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 16:27:26,400 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 320 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:26,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 134 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:27:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 16:27:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-12-14 16:27:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 91 states have internal predecessors, (94), 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 16:27:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-12-14 16:27:26,402 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 81 [2022-12-14 16:27:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:26,402 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-12-14 16:27:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 50 states have internal predecessors, (179), 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 16:27:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-12-14 16:27:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 16:27:26,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:26,402 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:26,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 16:27:26,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 16:27:26,603 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1645526632, now seen corresponding path program 16 times [2022-12-14 16:27:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:26,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404179133] [2022-12-14 16:27:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:26,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:27,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:27,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404179133] [2022-12-14 16:27:27,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404179133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:27,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804368539] [2022-12-14 16:27:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:27:27,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:27,346 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:27,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 16:27:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 16:27:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:27,707 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 14 treesize of output 10 [2022-12-14 16:27:28,716 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-12-14 16:27:28,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 37 [2022-12-14 16:27:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 9 proven. 244 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:28,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:27:29,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:27:29,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2022-12-14 16:27:29,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-12-14 16:27:29,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 16:27:29,768 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 39 treesize of output 39 [2022-12-14 16:27:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 9 proven. 244 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 16:27:29,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804368539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:27:29,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913728643] [2022-12-14 16:27:29,970 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:27:29,970 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:27:29,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:27:29,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:27:29,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:27:29,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:27:29,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:27:30,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:27:30,048 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 14 treesize of output 10 [2022-12-14 16:27:30,076 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 14 treesize of output 10 [2022-12-14 16:27:30,105 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 14 treesize of output 10 [2022-12-14 16:27:30,136 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 14 treesize of output 10 [2022-12-14 16:27:30,165 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 14 treesize of output 10 [2022-12-14 16:27:30,206 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:27:30,206 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 25 treesize of output 24 [2022-12-14 16:27:30,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:32,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13836#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:32,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:32,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:32,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 26] total 61 [2022-12-14 16:27:32,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394251218] [2022-12-14 16:27:32,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:32,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 16:27:32,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 16:27:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4907, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 16:27:32,255 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 61 states, 61 states have (on average 3.0327868852459017) internal successors, (185), 61 states have internal predecessors, (185), 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 16:27:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:37,400 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2022-12-14 16:27:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-14 16:27:37,400 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0327868852459017) internal successors, (185), 61 states have internal predecessors, (185), 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 83 [2022-12-14 16:27:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:37,400 INFO L225 Difference]: With dead ends: 253 [2022-12-14 16:27:37,400 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 16:27:37,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=867, Invalid=17493, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 16:27:37,401 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 559 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:37,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 483 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 16:27:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 16:27:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-12-14 16:27:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 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 16:27:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-12-14 16:27:37,403 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 83 [2022-12-14 16:27:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:37,403 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-12-14 16:27:37,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0327868852459017) internal successors, (185), 61 states have internal predecessors, (185), 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 16:27:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-12-14 16:27:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 16:27:37,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:37,403 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:37,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 16:27:37,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 16:27:37,604 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1907002798, now seen corresponding path program 17 times [2022-12-14 16:27:37,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:37,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937265129] [2022-12-14 16:27:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:37,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 49 proven. 221 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 16:27:38,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937265129] [2022-12-14 16:27:38,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937265129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880914669] [2022-12-14 16:27:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:27:38,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:38,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:38,146 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:38,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 16:27:38,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 16:27:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:27:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 16:27:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 16:27:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:27:39,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 16:27:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 16:27:40,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880914669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:27:40,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435429775] [2022-12-14 16:27:40,006 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:27:40,006 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:27:40,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:27:40,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:27:40,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:27:40,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:27:40,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 16:27:40,058 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 14 treesize of output 10 [2022-12-14 16:27:40,092 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 14 treesize of output 10 [2022-12-14 16:27:40,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 16:27:40,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-12-14 16:27:40,204 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 14 treesize of output 10 [2022-12-14 16:27:40,223 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 14 treesize of output 10 [2022-12-14 16:27:40,254 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 16:27:40,254 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 25 treesize of output 24 [2022-12-14 16:27:40,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:27:43,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14897#(and (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s1#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (not (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcmp_~s1#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (<= 0 |ULTIMATE.start_cstrcmp_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) (<= |ULTIMATE.start_cstrcmp_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 16:27:43,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:27:43,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:27:43,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 55 [2022-12-14 16:27:43,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615493983] [2022-12-14 16:27:43,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:27:43,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 16:27:43,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:27:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 16:27:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=4149, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 16:27:43,045 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 57 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 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 16:27:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:27:43,706 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-12-14 16:27:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 16:27:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 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 87 [2022-12-14 16:27:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:27:43,707 INFO L225 Difference]: With dead ends: 107 [2022-12-14 16:27:43,707 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 16:27:43,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 203 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1023, Invalid=5619, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 16:27:43,708 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 359 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:27:43,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 139 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:27:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 16:27:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2022-12-14 16:27:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 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 16:27:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-12-14 16:27:43,710 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 87 [2022-12-14 16:27:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:27:43,711 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-12-14 16:27:43,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 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 16:27:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-12-14 16:27:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 16:27:43,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:27:43,711 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 16:27:43,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 16:27:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-14 16:27:43,913 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 16:27:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:27:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1986582452, now seen corresponding path program 9 times [2022-12-14 16:27:43,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:27:43,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537484444] [2022-12-14 16:27:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:27:43,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:27:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:27:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 49 proven. 248 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 16:27:44,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:27:44,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537484444] [2022-12-14 16:27:44,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537484444] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:27:44,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541478148] [2022-12-14 16:27:44,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:27:44,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:27:44,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:27:44,700 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:27:44,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c79199-a9aa-43f6-be90-7fb14161012b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 16:27:45,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:27:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:27:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 16:27:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:27:45,268 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:27:45,268 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 16:27:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 64 proven. 233 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 16:27:45,546 INFO L328 TraceCheckSpWp]: Computing backward predicates...