./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/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_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- 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 10:20:48,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:20:48,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:20:48,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:20:48,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:20:48,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:20:48,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:20:48,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:20:48,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:20:48,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:20:48,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:20:48,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:20:48,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:20:48,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:20:48,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:20:48,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:20:48,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:20:48,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:20:48,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:20:48,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:20:48,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:20:48,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:20:48,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:20:48,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:20:48,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:20:48,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:20:48,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:20:48,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:20:48,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:20:48,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:20:48,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:20:48,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:20:48,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:20:48,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:20:48,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:20:48,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:20:48,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:20:48,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:20:48,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:20:48,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:20:48,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:20:48,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:20:48,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:20:48,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:20:48,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:20:48,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:20:48,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:20:48,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:20:48,995 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:20:48,996 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:20:48,996 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:20:48,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:20:48,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:20:48,996 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:20:48,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:20:48,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:20:48,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:20:48,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:20:48,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:20:48,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:20:48,999 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_108f6219-d2a4-41c9-b0bf-8b318cfed768/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2022-12-14 10:20:49,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:20:49,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:20:49,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:20:49,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:20:49,177 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:20:49,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-12-14 10:20:51,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:20:51,862 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:20:51,862 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-12-14 10:20:51,867 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data/f04d1ed2d/4bd139dd7ee1480689013544219e0eb9/FLAGc789e664d [2022-12-14 10:20:51,877 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data/f04d1ed2d/4bd139dd7ee1480689013544219e0eb9 [2022-12-14 10:20:51,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:20:51,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:20:51,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:20:51,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:20:51,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:20:51,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:20:51" (1/1) ... [2022-12-14 10:20:51,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371f7c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:51, skipping insertion in model container [2022-12-14 10:20:51,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:20:51" (1/1) ... [2022-12-14 10:20:51,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:20:51,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:20:52,005 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-12-14 10:20:52,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:20:52,029 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:20:52,038 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-12-14 10:20:52,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:20:52,055 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:20:52,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52 WrapperNode [2022-12-14 10:20:52,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:20:52,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:20:52,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:20:52,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:20:52,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,083 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-12-14 10:20:52,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:20:52,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:20:52,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:20:52,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:20:52,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:20:52,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:20:52,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:20:52,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:20:52,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (1/1) ... [2022-12-14 10:20:52,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:20:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:52,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:20:52,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:20:52,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:20:52,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:20:52,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:20:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:20:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:20:52,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:20:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:20:52,237 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:20:52,240 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:20:52,422 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:20:52,487 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:20:52,487 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 10:20:52,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:20:52 BoogieIcfgContainer [2022-12-14 10:20:52,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:20:52,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:20:52,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:20:52,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:20:52,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:20:51" (1/3) ... [2022-12-14 10:20:52,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efbac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:20:52, skipping insertion in model container [2022-12-14 10:20:52,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:20:52" (2/3) ... [2022-12-14 10:20:52,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efbac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:20:52, skipping insertion in model container [2022-12-14 10:20:52,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:20:52" (3/3) ... [2022-12-14 10:20:52,497 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-12-14 10:20:52,511 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:20:52,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:20:52,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:20:52,554 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@3c49b9bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:20:52,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:20:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 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 10:20:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:20:52,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:52,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:52,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash -479838233, now seen corresponding path program 1 times [2022-12-14 10:20:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:52,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33463085] [2022-12-14 10:20:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:52,834 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 10:20:52,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:52,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33463085] [2022-12-14 10:20:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33463085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:20:52,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:20:52,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:20:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975043389] [2022-12-14 10:20:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:20:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:20:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:20:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:20:52,873 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 10:20:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:52,944 INFO L93 Difference]: Finished difference Result 36 states and 59 transitions. [2022-12-14 10:20:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:20:52,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2022-12-14 10:20:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:52,953 INFO L225 Difference]: With dead ends: 36 [2022-12-14 10:20:52,954 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 10:20:52,956 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 10:20:52,959 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:52,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:20:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 10:20:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 10:20:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 10:20:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2022-12-14 10:20:52,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 15 [2022-12-14 10:20:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:52,985 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2022-12-14 10:20:52,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 10:20:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2022-12-14 10:20:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:20:52,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:52,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:52,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:20:52,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash 840923379, now seen corresponding path program 1 times [2022-12-14 10:20:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:52,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443938069] [2022-12-14 10:20:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:20:53,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:53,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443938069] [2022-12-14 10:20:53,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443938069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:20:53,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:20:53,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:20:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455770720] [2022-12-14 10:20:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:20:53,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:20:53,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:20:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:20:53,054 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 10:20:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:53,110 INFO L93 Difference]: Finished difference Result 39 states and 67 transitions. [2022-12-14 10:20:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:20:53,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:20:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:53,111 INFO L225 Difference]: With dead ends: 39 [2022-12-14 10:20:53,111 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 10:20:53,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:20:53,112 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:53,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 5 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:20:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 10:20:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 10:20:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 10:20:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-12-14 10:20:53,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2022-12-14 10:20:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:53,118 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-12-14 10:20:53,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 10:20:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-12-14 10:20:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 10:20:53,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:53,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:53,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:20:53,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1937886141, now seen corresponding path program 1 times [2022-12-14 10:20:53,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:53,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096458149] [2022-12-14 10:20:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:53,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:20:53,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096458149] [2022-12-14 10:20:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096458149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536469069] [2022-12-14 10:20:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:53,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:53,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:20:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:53,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:20:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:20:53,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:20:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536469069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101403178] [2022-12-14 10:20:53,362 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:20:53,363 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:20:53,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:20:53,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:20:53,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:20:53,473 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:20:53,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:20:53,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:20:53,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:20:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:20:53,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:20:53,697 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:20:53,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:20:53,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:20:54,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:20:54,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:20:54,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:20:54,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:20:54,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 10:20:54,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267848098] [2022-12-14 10:20:54,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:54,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:20:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:20:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:20:54,407 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 10:20:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:54,445 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-12-14 10:20:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:20:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) Word has length 26 [2022-12-14 10:20:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:54,446 INFO L225 Difference]: With dead ends: 51 [2022-12-14 10:20:54,446 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 10:20:54,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 19 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:20:54,447 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:54,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:20:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 10:20:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 10:20:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 10:20:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-12-14 10:20:54,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2022-12-14 10:20:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:54,451 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-12-14 10:20:54,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 10:20:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-12-14 10:20:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:20:54,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:54,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:54,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:20:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:54,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:54,655 INFO L85 PathProgramCache]: Analyzing trace with hash -364176457, now seen corresponding path program 2 times [2022-12-14 10:20:54,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675175343] [2022-12-14 10:20:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:54,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:20:54,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675175343] [2022-12-14 10:20:54,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675175343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029050754] [2022-12-14 10:20:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:20:54,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:54,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:20:54,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:20:54,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:20:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:20:54,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:20:54,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029050754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:54,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842228680] [2022-12-14 10:20:54,907 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:20:54,907 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:20:54,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:20:54,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:20:54,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:20:54,958 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:20:54,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:20:54,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:20:54,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:20:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:20:55,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:20:55,049 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:20:55,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:20:55,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:20:55,352 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:20:55,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:20:55,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:20:55,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:20:55,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-14 10:20:55,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598572277] [2022-12-14 10:20:55,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:20:55,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:20:55,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:20:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:20:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:20:55,669 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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 10:20:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:20:55,732 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2022-12-14 10:20:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:20:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) Word has length 27 [2022-12-14 10:20:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:20:55,733 INFO L225 Difference]: With dead ends: 59 [2022-12-14 10:20:55,733 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 10:20:55,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 21 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:20:55,734 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:20:55,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:20:55,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 10:20:55,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 10:20:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 10:20:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-12-14 10:20:55,738 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2022-12-14 10:20:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:20:55,738 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-12-14 10:20:55,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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 10:20:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-12-14 10:20:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 10:20:55,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:20:55,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:20:55,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:20:55,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:55,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:20:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:20:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 658319783, now seen corresponding path program 3 times [2022-12-14 10:20:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:20:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963331709] [2022-12-14 10:20:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:20:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:20:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:20:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:20:58,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:20:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963331709] [2022-12-14 10:20:58,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963331709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:20:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347314235] [2022-12-14 10:20:58,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:20:58,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:20:58,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:20:58,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:20:58,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:20:58,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:20:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:20:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 10:20:58,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:20:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:20:58,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:59,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:20:59,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-12-14 10:20:59,335 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-14 10:20:59,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-12-14 10:20:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:20:59,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347314235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:20:59,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085873159] [2022-12-14 10:20:59,419 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:20:59,420 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:20:59,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:20:59,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:20:59,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:20:59,464 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:20:59,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:20:59,501 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:20:59,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:20:59,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:20:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:20:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:20:59,566 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:20:59,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:20:59,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:20:59,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:00,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1140#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:00,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:00,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:00,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2022-12-14 10:21:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043355706] [2022-12-14 10:21:00,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:00,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:21:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:21:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:21:00,699 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 10:21:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:01,346 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-12-14 10:21:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:21:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 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 37 [2022-12-14 10:21:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:01,347 INFO L225 Difference]: With dead ends: 69 [2022-12-14 10:21:01,347 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 10:21:01,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 40 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:21:01,348 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:01,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:21:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 10:21:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-12-14 10:21:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 10:21:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-12-14 10:21:01,356 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 37 [2022-12-14 10:21:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:01,356 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-12-14 10:21:01,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 10:21:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-12-14 10:21:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 10:21:01,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:01,357 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:01,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:01,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:01,559 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1240109371, now seen corresponding path program 4 times [2022-12-14 10:21:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652434949] [2022-12-14 10:21:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:01,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:21:01,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652434949] [2022-12-14 10:21:01,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652434949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055910858] [2022-12-14 10:21:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:21:01,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:01,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:01,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:21:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:21:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:21:01,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:21:01,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055910858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83014275] [2022-12-14 10:21:01,839 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:01,840 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:01,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:01,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:01,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:01,892 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:21:01,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:21:01,932 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:01,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:01,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:21:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:02,015 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:02,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:21:02,058 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 16 treesize of output 12 [2022-12-14 10:21:02,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:02,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1652#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:02,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:02,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:02,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 10:21:02,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446903370] [2022-12-14 10:21:02,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:02,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:21:02,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:21:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:21:02,370 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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 10:21:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:02,533 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2022-12-14 10:21:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:21:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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 38 [2022-12-14 10:21:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:02,534 INFO L225 Difference]: With dead ends: 140 [2022-12-14 10:21:02,534 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 10:21:02,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:21:02,535 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:02,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 13 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:21:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 10:21:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2022-12-14 10:21:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 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 10:21:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-12-14 10:21:02,544 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 38 [2022-12-14 10:21:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:02,544 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-12-14 10:21:02,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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 10:21:02,544 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-12-14 10:21:02,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 10:21:02,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:02,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:02,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:21:02,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:21:02,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1788088122, now seen corresponding path program 5 times [2022-12-14 10:21:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:02,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547404467] [2022-12-14 10:21:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:02,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:21:02,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547404467] [2022-12-14 10:21:02,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547404467] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:02,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046888177] [2022-12-14 10:21:02,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:21:02,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:02,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:02,916 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:02,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:21:02,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:21:02,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:21:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:21:03,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:21:03,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046888177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1947136880] [2022-12-14 10:21:03,094 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:03,094 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:03,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:03,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:03,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:03,138 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:21:03,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:21:03,166 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:03,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:03,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:21:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:03,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:03,228 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:03,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:21:03,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:03,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:03,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2310#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:03,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:03,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:03,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 10:21:03,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130570860] [2022-12-14 10:21:03,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:03,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:21:03,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:21:03,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:21:03,560 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 10:21:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:03,695 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-12-14 10:21:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:21:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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) Word has length 39 [2022-12-14 10:21:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:03,695 INFO L225 Difference]: With dead ends: 76 [2022-12-14 10:21:03,695 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 10:21:03,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:21:03,696 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:03,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 7 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:21:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 10:21:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 10:21:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 10:21:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-12-14 10:21:03,703 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 39 [2022-12-14 10:21:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:03,703 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-12-14 10:21:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 10:21:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-12-14 10:21:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 10:21:03,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:03,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:03,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:21:03,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:03,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1861391875, now seen corresponding path program 6 times [2022-12-14 10:21:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:03,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050651284] [2022-12-14 10:21:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:08,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050651284] [2022-12-14 10:21:08,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050651284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873919343] [2022-12-14 10:21:08,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:08,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:08,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:08,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:21:08,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:08,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-14 10:21:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:21:09,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:10,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:21:10,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-12-14 10:21:10,730 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-14 10:21:10,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-12-14 10:21:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:21:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873919343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228729945] [2022-12-14 10:21:10,855 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:10,855 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:10,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:10,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:10,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:10,893 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:10,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:10,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:21:10,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:10,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:10,964 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:10,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:21:11,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:11,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:11,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2903#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:11,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:11,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:11,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14, 16] total 59 [2022-12-14 10:21:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558870853] [2022-12-14 10:21:11,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:11,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 10:21:11,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:11,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 10:21:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3762, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 10:21:11,625 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 59 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 10:21:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:17,367 INFO L93 Difference]: Finished difference Result 173 states and 223 transitions. [2022-12-14 10:21:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 10:21:17,368 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 10:21:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:17,368 INFO L225 Difference]: With dead ends: 173 [2022-12-14 10:21:17,369 INFO L226 Difference]: Without dead ends: 132 [2022-12-14 10:21:17,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 111 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1128, Invalid=9174, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 10:21:17,370 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 175 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 942 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:17,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 43 Invalid, 3933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [942 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 10:21:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-14 10:21:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2022-12-14 10:21:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2427184466019416) internal successors, (128), 103 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 10:21:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-12-14 10:21:17,388 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 48 [2022-12-14 10:21:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:17,389 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-12-14 10:21:17,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 10:21:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-12-14 10:21:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 10:21:17,389 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:17,389 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:17,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:21:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:17,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:17,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1654244752, now seen corresponding path program 7 times [2022-12-14 10:21:17,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:17,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517645681] [2022-12-14 10:21:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:17,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 10:21:17,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517645681] [2022-12-14 10:21:17,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517645681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660097157] [2022-12-14 10:21:17,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:21:17,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:17,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:17,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:17,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:21:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:21:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 10:21:17,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 10:21:17,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660097157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:17,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797976592] [2022-12-14 10:21:17,930 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:17,930 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:17,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:17,930 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:17,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:17,970 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:21:17,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:21:18,006 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:18,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:18,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:21:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:18,071 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:18,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:21:18,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:18,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:18,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3828#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:18,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:18,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:18,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-14 10:21:18,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440491827] [2022-12-14 10:21:18,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:21:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:18,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:21:18,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:21:18,372 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 10:21:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:18,634 INFO L93 Difference]: Finished difference Result 208 states and 258 transitions. [2022-12-14 10:21:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:21:18,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) Word has length 49 [2022-12-14 10:21:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:18,635 INFO L225 Difference]: With dead ends: 208 [2022-12-14 10:21:18,635 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 10:21:18,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:21:18,636 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:18,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:21:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 10:21:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-12-14 10:21:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-12-14 10:21:18,646 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 49 [2022-12-14 10:21:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:18,646 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-12-14 10:21:18,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 10:21:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-12-14 10:21:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:21:18,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:18,647 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:18,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:21:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:18,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:18,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1996116452, now seen corresponding path program 8 times [2022-12-14 10:21:18,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282809380] [2022-12-14 10:21:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:21:18,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282809380] [2022-12-14 10:21:18,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282809380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162428468] [2022-12-14 10:21:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:21:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:18,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:21:19,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:21:19,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:21:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:21:19,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:21:19,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162428468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816396444] [2022-12-14 10:21:19,166 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:19,167 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:19,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:19,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:19,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:19,206 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:21:19,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:21:19,243 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:19,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:19,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:19,323 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:19,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:21:19,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:19,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:20,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4718#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:20,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:20,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:20,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-14 10:21:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079295510] [2022-12-14 10:21:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:21:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:21:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:21:20,057 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 10:21:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:20,258 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-12-14 10:21:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:21:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) Word has length 58 [2022-12-14 10:21:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:20,259 INFO L225 Difference]: With dead ends: 63 [2022-12-14 10:21:20,259 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 10:21:20,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 52 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:21:20,260 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:20,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:21:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 10:21:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-14 10:21:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-12-14 10:21:20,272 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 58 [2022-12-14 10:21:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:20,272 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-12-14 10:21:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 10:21:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-12-14 10:21:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:21:20,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:20,273 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:20,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:20,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:20,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1749488487, now seen corresponding path program 9 times [2022-12-14 10:21:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737594896] [2022-12-14 10:21:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:26,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737594896] [2022-12-14 10:21:26,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737594896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:26,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670979322] [2022-12-14 10:21:26,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:26,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:26,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:21:26,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:26,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:26,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 172 conjunts are in the unsatisfiable core [2022-12-14 10:21:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:21:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:29,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:21:29,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 185 [2022-12-14 10:21:29,531 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 10:21:29,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 30 [2022-12-14 10:21:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:21:29,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670979322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882220256] [2022-12-14 10:21:29,594 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:29,594 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:29,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:29,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:29,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:29,632 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:21:29,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:21:29,663 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:29,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:29,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:21:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:29,747 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:29,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:21:29,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:29,937 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:30,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5385#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:30,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:30,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:30,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 14, 14] total 65 [2022-12-14 10:21:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377282622] [2022-12-14 10:21:30,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:30,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 10:21:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 10:21:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=4563, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 10:21:30,298 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 65 states, 65 states have (on average 2.5384615384615383) internal successors, (165), 65 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 10:21:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:37,096 INFO L93 Difference]: Finished difference Result 198 states and 241 transitions. [2022-12-14 10:21:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 10:21:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.5384615384615383) internal successors, (165), 65 states have internal predecessors, (165), 0 states have call successors, (0), 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 59 [2022-12-14 10:21:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:37,098 INFO L225 Difference]: With dead ends: 198 [2022-12-14 10:21:37,098 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 10:21:37,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 139 SyntacticMatches, 26 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=887, Invalid=9013, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 10:21:37,099 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 257 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 3619 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 4782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 3619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:37,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 120 Invalid, 4782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 3619 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 10:21:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 10:21:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 115. [2022-12-14 10:21:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 10:21:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-12-14 10:21:37,129 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 59 [2022-12-14 10:21:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:37,129 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-12-14 10:21:37,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.5384615384615383) internal successors, (165), 65 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 10:21:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-12-14 10:21:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 10:21:37,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:37,130 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:37,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:21:37,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:37,331 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1601011132, now seen corresponding path program 10 times [2022-12-14 10:21:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:37,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743574855] [2022-12-14 10:21:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:37,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:21:37,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:37,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743574855] [2022-12-14 10:21:37,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743574855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:37,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966191498] [2022-12-14 10:21:37,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:21:37,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:37,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:37,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:37,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:21:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:21:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:21:37,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:21:37,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966191498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:37,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737918029] [2022-12-14 10:21:37,731 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:37,731 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:37,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:37,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:37,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:37,768 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:37,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:37,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:21:37,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:37,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:37,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:37,835 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:37,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:21:37,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:38,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:38,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6433#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:38,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:38,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:38,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-14 10:21:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720945508] [2022-12-14 10:21:38,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:21:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:21:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:21:38,136 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 10:21:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:38,432 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-12-14 10:21:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:21:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 10:21:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:38,432 INFO L225 Difference]: With dead ends: 211 [2022-12-14 10:21:38,432 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 10:21:38,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 158 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:21:38,433 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:38,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:21:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 10:21:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-12-14 10:21:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 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 10:21:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-12-14 10:21:38,449 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 60 [2022-12-14 10:21:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:38,449 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-12-14 10:21:38,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 10:21:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-12-14 10:21:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:21:38,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:38,450 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:38,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:38,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:38,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1648578040, now seen corresponding path program 11 times [2022-12-14 10:21:38,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:38,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505203325] [2022-12-14 10:21:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:38,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 10:21:38,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505203325] [2022-12-14 10:21:38,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505203325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155783061] [2022-12-14 10:21:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:21:38,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:38,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:38,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:21:38,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:21:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:21:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 10:21:39,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 10:21:39,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155783061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:39,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795692588] [2022-12-14 10:21:39,068 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:39,069 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:39,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:39,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:39,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:39,100 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:39,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:39,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:21:39,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:21:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:39,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:39,165 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:39,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:21:39,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:39,330 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:39,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7422#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:39,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:39,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:39,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-14 10:21:39,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564841623] [2022-12-14 10:21:39,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:39,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:21:39,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:21:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:21:39,441 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 10:21:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:39,660 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-12-14 10:21:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:21:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 69 [2022-12-14 10:21:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:39,661 INFO L225 Difference]: With dead ends: 74 [2022-12-14 10:21:39,661 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 10:21:39,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 190 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:21:39,662 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:39,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:21:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 10:21:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 10:21:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 10:21:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-12-14 10:21:39,679 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 69 [2022-12-14 10:21:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:39,679 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-12-14 10:21:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 10:21:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-12-14 10:21:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:21:39,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:39,680 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:39,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:39,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:39,881 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 433108931, now seen corresponding path program 12 times [2022-12-14 10:21:39,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:39,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284442985] [2022-12-14 10:21:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:48,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:48,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284442985] [2022-12-14 10:21:48,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284442985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:48,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587242043] [2022-12-14 10:21:48,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:48,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:48,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:48,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:48,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:21:48,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:48,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:48,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 222 conjunts are in the unsatisfiable core [2022-12-14 10:21:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 150 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:21:49,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:51,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:21:51,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 285 [2022-12-14 10:21:52,902 INFO L321 Elim1Store]: treesize reduction 250, result has 7.7 percent of original size [2022-12-14 10:21:52,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 36 [2022-12-14 10:21:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:21:53,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587242043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:53,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [151462229] [2022-12-14 10:21:53,286 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:21:53,286 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:53,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:53,286 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:53,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:53,317 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:21:53,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:21:53,345 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:21:53,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:21:53,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:21:53,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:53,402 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:53,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:21:53,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:21:53,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:53,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8223#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:53,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:53,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:53,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 18, 25] total 86 [2022-12-14 10:21:53,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056114189] [2022-12-14 10:21:53,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:53,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 10:21:53,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 10:21:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=7648, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 10:21:53,988 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 86 states, 86 states have (on average 2.3372093023255816) internal successors, (201), 86 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 10:22:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:02,808 INFO L93 Difference]: Finished difference Result 220 states and 259 transitions. [2022-12-14 10:22:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 10:22:02,809 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.3372093023255816) internal successors, (201), 86 states have internal predecessors, (201), 0 states have call successors, (0), 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 70 [2022-12-14 10:22:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:02,809 INFO L225 Difference]: With dead ends: 220 [2022-12-14 10:22:02,810 INFO L226 Difference]: Without dead ends: 161 [2022-12-14 10:22:02,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 158 SyntacticMatches, 30 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1601, Invalid=14911, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 10:22:02,812 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 204 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4203 mSolverCounterSat, 1351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1351 IncrementalHoareTripleChecker+Valid, 4203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:02,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 69 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1351 Valid, 4203 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 10:22:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-14 10:22:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 135. [2022-12-14 10:22:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 134 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 10:22:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2022-12-14 10:22:02,854 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 70 [2022-12-14 10:22:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:02,854 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2022-12-14 10:22:02,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.3372093023255816) internal successors, (201), 86 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 10:22:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2022-12-14 10:22:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:22:02,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:02,855 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:02,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 10:22:03,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:03,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 540895592, now seen corresponding path program 13 times [2022-12-14 10:22:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:03,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048835871] [2022-12-14 10:22:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:03,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 10:22:03,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048835871] [2022-12-14 10:22:03,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048835871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327512565] [2022-12-14 10:22:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:22:03,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:03,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:03,238 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:22:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:22:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 10:22:03,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 10:22:03,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327512565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:03,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917618217] [2022-12-14 10:22:03,537 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:22:03,537 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:03,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:03,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:03,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:03,580 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:22:03,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:22:03,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:22:03,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:22:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:03,651 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:22:03,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:22:03,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:22:03,826 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:04,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9443#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:04,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:04,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:04,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-14 10:22:04,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623310869] [2022-12-14 10:22:04,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:04,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:22:04,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:22:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:22:04,862 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 10:22:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:05,254 INFO L93 Difference]: Finished difference Result 247 states and 286 transitions. [2022-12-14 10:22:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:22:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) Word has length 71 [2022-12-14 10:22:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:05,255 INFO L225 Difference]: With dead ends: 247 [2022-12-14 10:22:05,255 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 10:22:05,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 133 SyntacticMatches, 67 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:22:05,256 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:05,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:22:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 10:22:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-12-14 10:22:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 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 10:22:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-12-14 10:22:05,282 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 71 [2022-12-14 10:22:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:05,283 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-12-14 10:22:05,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 10:22:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-12-14 10:22:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 10:22:05,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:05,283 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:05,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 10:22:05,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:22:05,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1107898404, now seen corresponding path program 14 times [2022-12-14 10:22:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:05,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677947634] [2022-12-14 10:22:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:05,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-14 10:22:05,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677947634] [2022-12-14 10:22:05,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677947634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515918198] [2022-12-14 10:22:05,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:22:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:05,652 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:05,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:22:05,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:22:05,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:05,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:22:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-14 10:22:05,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-14 10:22:05,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515918198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:05,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364620607] [2022-12-14 10:22:05,933 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:22:05,933 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:05,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:05,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:05,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:05,968 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:22:05,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:22:05,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:22:05,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:22:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:06,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:22:06,035 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:22:06,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:22:06,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:22:06,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:06,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10597#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:06,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:06,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:06,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-14 10:22:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926533272] [2022-12-14 10:22:06,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:06,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:22:06,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:22:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:22:06,333 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 10:22:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:06,616 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-12-14 10:22:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:22:06,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 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 80 [2022-12-14 10:22:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:06,617 INFO L225 Difference]: With dead ends: 85 [2022-12-14 10:22:06,617 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 10:22:06,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 221 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:22:06,618 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:06,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:22:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 10:22:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-12-14 10:22:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:22:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2022-12-14 10:22:06,644 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 80 [2022-12-14 10:22:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:06,645 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2022-12-14 10:22:06,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 10:22:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2022-12-14 10:22:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 10:22:06,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:06,645 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:06,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:22:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:22:06,847 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash -15467225, now seen corresponding path program 15 times [2022-12-14 10:22:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830101350] [2022-12-14 10:22:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:06,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 12 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:22:20,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:20,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830101350] [2022-12-14 10:22:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830101350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:20,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733211129] [2022-12-14 10:22:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:22:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:20,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:20,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:22:20,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:22:20,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:20,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 256 conjunts are in the unsatisfiable core [2022-12-14 10:22:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:22:22,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:25,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:22:25,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 104 treesize of output 408 [2022-12-14 10:22:28,501 INFO L321 Elim1Store]: treesize reduction 366, result has 6.4 percent of original size [2022-12-14 10:22:28,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 41 [2022-12-14 10:22:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:22:28,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733211129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:28,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816224124] [2022-12-14 10:22:28,743 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:22:28,743 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:28,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:28,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:28,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:28,787 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:22:28,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:22:28,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:22:28,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:22:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:22:28,866 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:22:28,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:22:28,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:22:29,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:29,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11526#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:29,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:29,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:29,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 20, 25] total 101 [2022-12-14 10:22:29,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264467262] [2022-12-14 10:22:29,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:29,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 10:22:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 10:22:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=10502, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 10:22:29,701 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 101 states, 101 states have (on average 2.267326732673267) internal successors, (229), 101 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 10:22:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:40,968 INFO L93 Difference]: Finished difference Result 254 states and 293 transitions. [2022-12-14 10:22:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 10:22:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.267326732673267) internal successors, (229), 101 states have internal predecessors, (229), 0 states have call successors, (0), 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 10:22:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:40,970 INFO L225 Difference]: With dead ends: 254 [2022-12-14 10:22:40,970 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 10:22:40,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 184 SyntacticMatches, 33 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7930 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1616, Invalid=20734, Unknown=0, NotChecked=0, Total=22350 [2022-12-14 10:22:40,971 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4407 mSolverCounterSat, 1451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1451 IncrementalHoareTripleChecker+Valid, 4407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:40,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 75 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1451 Valid, 4407 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 10:22:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 10:22:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 92. [2022-12-14 10:22:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.164835164835165) internal successors, (106), 91 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 10:22:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2022-12-14 10:22:41,007 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 81 [2022-12-14 10:22:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:41,008 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2022-12-14 10:22:41,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.267326732673267) internal successors, (229), 101 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 10:22:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2022-12-14 10:22:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:22:41,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:41,008 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:41,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 10:22:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:41,209 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1747363091, now seen corresponding path program 16 times [2022-12-14 10:22:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513289758] [2022-12-14 10:22:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 10:22:41,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513289758] [2022-12-14 10:22:41,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513289758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500189217] [2022-12-14 10:22:41,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:22:41,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:41,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:41,438 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:41,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 10:22:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:22:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 10:22:41,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-12-14 10:22:41,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500189217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152683186] [2022-12-14 10:22:41,670 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:22:41,670 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:41,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:41,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:41,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:41,710 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:22:41,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:22:41,750 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:22:41,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:22:41,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:22:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:41,809 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:22:41,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:22:41,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:22:41,976 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:42,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12839#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:42,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:42,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:42,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-12-14 10:22:42,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277866515] [2022-12-14 10:22:42,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:42,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:22:42,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:22:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:22:42,139 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 10:22:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:42,535 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2022-12-14 10:22:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:22:42,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) Word has length 87 [2022-12-14 10:22:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:42,536 INFO L225 Difference]: With dead ends: 160 [2022-12-14 10:22:42,536 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 10:22:42,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 233 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:22:42,537 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:42,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:22:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 10:22:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-12-14 10:22:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 10:22:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-12-14 10:22:42,573 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 87 [2022-12-14 10:22:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:42,573 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-12-14 10:22:42,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 10:22:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-12-14 10:22:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 10:22:42,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:42,574 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:42,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 10:22:42,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:22:42,775 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1697159555, now seen corresponding path program 17 times [2022-12-14 10:22:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:42,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883638586] [2022-12-14 10:22:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:42,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:23:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 20 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:23:00,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:23:00,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883638586] [2022-12-14 10:23:00,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883638586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:23:00,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634832939] [2022-12-14 10:23:00,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:23:00,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:23:00,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:23:00,648 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:23:00,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 10:23:00,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:23:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:23:00,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 319 conjunts are in the unsatisfiable core [2022-12-14 10:23:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:23:01,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:23:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:07,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:23:07,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 89 [2022-12-14 10:23:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:23:07,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:23:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:23:15,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634832939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:23:15,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [799519788] [2022-12-14 10:23:15,439 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:23:15,439 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:23:15,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:23:15,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:23:15,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:23:15,474 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:23:15,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:23:15,508 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:23:15,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:23:15,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:23:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:15,566 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:23:15,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:23:15,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:23:15,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:23:22,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14011#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:23:22,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:23:22,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:23:22,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 28, 20] total 110 [2022-12-14 10:23:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518847454] [2022-12-14 10:23:22,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:23:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-12-14 10:23:22,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:23:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-12-14 10:23:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=12396, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 10:23:22,675 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 110 states, 110 states have (on average 2.4) internal successors, (264), 110 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 10:23:50,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:23:50,792 INFO L93 Difference]: Finished difference Result 355 states and 404 transitions. [2022-12-14 10:23:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 10:23:50,792 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.4) internal successors, (264), 110 states have internal predecessors, (264), 0 states have call successors, (0), 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 92 [2022-12-14 10:23:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:23:50,793 INFO L225 Difference]: With dead ends: 355 [2022-12-14 10:23:50,793 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 10:23:50,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 123 SyntacticMatches, 129 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18074 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=2872, Invalid=26198, Unknown=0, NotChecked=0, Total=29070 [2022-12-14 10:23:50,794 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 293 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 9659 mSolverCounterSat, 2713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 12372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2713 IncrementalHoareTripleChecker+Valid, 9659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:23:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 87 Invalid, 12372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2713 Valid, 9659 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-12-14 10:23:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 10:23:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 95. [2022-12-14 10:23:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 10:23:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-12-14 10:23:50,853 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 92 [2022-12-14 10:23:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:23:50,853 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-12-14 10:23:50,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.4) internal successors, (264), 110 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 10:23:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-12-14 10:23:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 10:23:50,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:23:50,854 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:23:50,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 10:23:51,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:23:51,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:23:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:23:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash -14298188, now seen corresponding path program 18 times [2022-12-14 10:23:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:23:51,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760694730] [2022-12-14 10:23:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:23:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:23:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:23:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-14 10:23:51,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:23:51,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760694730] [2022-12-14 10:23:51,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760694730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:23:51,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725118495] [2022-12-14 10:23:51,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:23:51,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:23:51,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:23:51,307 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:23:51,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:23:51,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:23:51,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:23:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:23:51,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:23:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-14 10:23:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:23:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-14 10:23:51,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725118495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:23:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546516290] [2022-12-14 10:23:51,870 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:23:51,870 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:23:51,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:23:51,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:23:51,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:23:51,910 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:23:51,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:23:51,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:23:51,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:23:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:51,978 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:23:51,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:23:52,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:23:52,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:23:52,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15614#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:23:52,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:23:52,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:23:52,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-12-14 10:23:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176917502] [2022-12-14 10:23:52,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:23:52,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 10:23:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:23:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 10:23:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2012, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 10:23:52,347 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 10:23:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:23:53,215 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2022-12-14 10:23:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:23:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 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 94 [2022-12-14 10:23:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:23:53,217 INFO L225 Difference]: With dead ends: 180 [2022-12-14 10:23:53,217 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 10:23:53,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 244 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=567, Invalid=3723, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 10:23:53,218 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:23:53,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:23:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 10:23:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-12-14 10:23:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 10:23:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-12-14 10:23:53,282 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 94 [2022-12-14 10:23:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:23:53,282 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-12-14 10:23:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 10:23:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-12-14 10:23:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 10:23:53,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:23:53,283 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:23:53,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 10:23:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:23:53,484 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:23:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:23:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1312024295, now seen corresponding path program 19 times [2022-12-14 10:23:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:23:53,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164355104] [2022-12-14 10:23:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:23:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:23:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:24:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 37 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:24:18,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:24:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164355104] [2022-12-14 10:24:18,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164355104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:24:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549449980] [2022-12-14 10:24:18,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:24:18,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:24:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:24:18,919 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:24:18,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 10:24:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:24:19,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 348 conjunts are in the unsatisfiable core [2022-12-14 10:24:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:24:19,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:24:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:24:25,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:24:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 10:24:28,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549449980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:24:28,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983968568] [2022-12-14 10:24:28,461 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:24:28,461 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:24:28,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:24:28,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:24:28,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:24:28,499 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:24:28,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:24:28,536 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:24:28,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:24:28,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:24:28,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:24:28,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:24:28,596 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:24:28,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:24:28,645 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 16 treesize of output 12 [2022-12-14 10:24:28,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:24:29,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16945#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:24:29,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:24:29,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:24:29,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 29, 21] total 124 [2022-12-14 10:24:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634445358] [2022-12-14 10:24:29,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:24:29,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-12-14 10:24:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:24:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-12-14 10:24:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=15830, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 10:24:29,429 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 124 states, 124 states have (on average 2.370967741935484) internal successors, (294), 124 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 10:24:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:24:55,602 INFO L93 Difference]: Finished difference Result 446 states and 533 transitions. [2022-12-14 10:24:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 10:24:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.370967741935484) internal successors, (294), 124 states have internal predecessors, (294), 0 states have call successors, (0), 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 103 [2022-12-14 10:24:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:24:55,605 INFO L225 Difference]: With dead ends: 446 [2022-12-14 10:24:55,605 INFO L226 Difference]: Without dead ends: 361 [2022-12-14 10:24:55,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 235 SyntacticMatches, 47 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15111 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=3088, Invalid=34354, Unknown=0, NotChecked=0, Total=37442 [2022-12-14 10:24:55,607 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 381 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 10068 mSolverCounterSat, 4171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 14239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4171 IncrementalHoareTripleChecker+Valid, 10068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:24:55,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 101 Invalid, 14239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4171 Valid, 10068 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-12-14 10:24:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-12-14 10:24:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 274. [2022-12-14 10:24:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.1758241758241759) internal successors, (321), 273 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 10:24:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 321 transitions. [2022-12-14 10:24:55,806 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 321 transitions. Word has length 103 [2022-12-14 10:24:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:24:55,806 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 321 transitions. [2022-12-14 10:24:55,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.370967741935484) internal successors, (294), 124 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 10:24:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 321 transitions. [2022-12-14 10:24:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 10:24:55,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:24:55,807 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:24:55,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 10:24:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 10:24:56,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:24:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:24:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1924758404, now seen corresponding path program 20 times [2022-12-14 10:24:56,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:24:56,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985815983] [2022-12-14 10:24:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:24:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:24:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:24:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-12-14 10:24:56,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:24:56,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985815983] [2022-12-14 10:24:56,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985815983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:24:56,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902777069] [2022-12-14 10:24:56,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:24:56,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:24:56,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:24:56,301 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:24:56,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 10:24:56,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:24:56,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:24:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:24:56,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:24:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-12-14 10:24:56,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:24:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-12-14 10:24:56,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902777069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:24:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572073167] [2022-12-14 10:24:56,744 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:24:56,744 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:24:56,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:24:56,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:24:56,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:24:56,778 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:24:56,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:24:56,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:24:56,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:24:56,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:24:56,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:24:56,838 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:24:56,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:24:56,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:24:57,018 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:24:57,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19153#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:24:57,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:24:57,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:24:57,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-12-14 10:24:57,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861591020] [2022-12-14 10:24:57,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:24:57,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:24:57,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:24:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:24:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 10:24:57,172 INFO L87 Difference]: Start difference. First operand 274 states and 321 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:24:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:24:58,196 INFO L93 Difference]: Finished difference Result 574 states and 673 transitions. [2022-12-14 10:24:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:24:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-12-14 10:24:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:24:58,198 INFO L225 Difference]: With dead ends: 574 [2022-12-14 10:24:58,198 INFO L226 Difference]: Without dead ends: 222 [2022-12-14 10:24:58,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 286 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 10:24:58,199 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:24:58,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:24:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-14 10:24:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-12-14 10:24:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 214 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 10:24:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 246 transitions. [2022-12-14 10:24:58,357 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 246 transitions. Word has length 104 [2022-12-14 10:24:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:24:58,357 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 246 transitions. [2022-12-14 10:24:58,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:24:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 246 transitions. [2022-12-14 10:24:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 10:24:58,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:24:58,358 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:24:58,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 10:24:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:24:58,558 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:24:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:24:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1585135992, now seen corresponding path program 21 times [2022-12-14 10:24:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:24:58,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839509116] [2022-12-14 10:24:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:24:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:24:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:24:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-12-14 10:24:58,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:24:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839509116] [2022-12-14 10:24:58,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839509116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:24:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621073520] [2022-12-14 10:24:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:24:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:24:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:24:58,850 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:24:58,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 10:24:58,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:24:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:24:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:24:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:24:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-12-14 10:24:59,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:24:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-12-14 10:24:59,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621073520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:24:59,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501398292] [2022-12-14 10:24:59,256 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:24:59,256 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:24:59,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:24:59,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:24:59,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:24:59,287 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:24:59,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:24:59,318 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:24:59,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:24:59,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:24:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:24:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:24:59,377 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:24:59,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:24:59,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:24:59,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:25:00,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21447#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:25:00,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:25:00,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:25:00,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-12-14 10:25:00,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472600381] [2022-12-14 10:25:00,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:25:00,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:25:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:25:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:25:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 10:25:00,702 INFO L87 Difference]: Start difference. First operand 215 states and 246 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 10:25:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:25:01,292 INFO L93 Difference]: Finished difference Result 219 states and 250 transitions. [2022-12-14 10:25:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 10:25:01,293 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 113 [2022-12-14 10:25:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:25:01,293 INFO L225 Difference]: With dead ends: 219 [2022-12-14 10:25:01,293 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 10:25:01,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 217 SyntacticMatches, 107 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 10:25:01,294 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:25:01,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:25:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 10:25:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 115. [2022-12-14 10:25:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 10:25:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-12-14 10:25:01,383 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 113 [2022-12-14 10:25:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:25:01,383 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-12-14 10:25:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 10:25:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-12-14 10:25:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 10:25:01,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:25:01,384 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:25:01,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 10:25:01,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 10:25:01,585 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:25:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:25:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1895154877, now seen corresponding path program 22 times [2022-12-14 10:25:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:25:01,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300012745] [2022-12-14 10:25:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:25:01,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:25:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:25:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 49 proven. 446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:25:36,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:25:36,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300012745] [2022-12-14 10:25:36,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300012745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:25:36,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316760865] [2022-12-14 10:25:36,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:25:36,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:25:36,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:25:36,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:25:36,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 10:25:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:25:37,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 390 conjunts are in the unsatisfiable core [2022-12-14 10:25:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:25:37,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:25:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:25:44,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:25:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 10:25:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316760865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:25:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720021021] [2022-12-14 10:25:48,672 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:25:48,672 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:25:48,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:25:48,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:25:48,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:25:48,705 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:25:48,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:25:48,740 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:25:48,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:25:48,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:25:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:25:48,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:25:48,801 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:25:48,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:25:48,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:25:48,966 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:25:49,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22942#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:25:49,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:25:49,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:25:49,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 32, 23] total 134 [2022-12-14 10:25:49,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111472105] [2022-12-14 10:25:49,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:25:49,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-12-14 10:25:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:25:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-12-14 10:25:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=18396, Unknown=0, NotChecked=0, Total=19182 [2022-12-14 10:25:49,770 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 134 states, 134 states have (on average 2.4328358208955225) internal successors, (326), 134 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 10:26:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:18,081 INFO L93 Difference]: Finished difference Result 450 states and 498 transitions. [2022-12-14 10:26:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-14 10:26:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.4328358208955225) internal successors, (326), 134 states have internal predecessors, (326), 0 states have call successors, (0), 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 114 [2022-12-14 10:26:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:18,083 INFO L225 Difference]: With dead ends: 450 [2022-12-14 10:26:18,083 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 10:26:18,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 255 SyntacticMatches, 61 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16835 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=2361, Invalid=38241, Unknown=0, NotChecked=0, Total=40602 [2022-12-14 10:26:18,086 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 144 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 9586 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 9586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:18,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 226 Invalid, 11377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 9586 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-12-14 10:26:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 10:26:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 205. [2022-12-14 10:26:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.1127450980392157) internal successors, (227), 204 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 10:26:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2022-12-14 10:26:18,282 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 114 [2022-12-14 10:26:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:18,282 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2022-12-14 10:26:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.4328358208955225) internal successors, (326), 134 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 10:26:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2022-12-14 10:26:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:26:18,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:18,283 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:26:18,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 10:26:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:18,485 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:26:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1952380337, now seen corresponding path program 23 times [2022-12-14 10:26:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:26:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084997250] [2022-12-14 10:26:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:26:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2022-12-14 10:26:18,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:26:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084997250] [2022-12-14 10:26:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084997250] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:26:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359544260] [2022-12-14 10:26:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:18,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:18,815 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:18,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 10:26:18,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:26:18,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:18,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:26:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2022-12-14 10:26:19,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2022-12-14 10:26:19,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359544260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:19,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095609584] [2022-12-14 10:26:19,459 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:26:19,459 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:26:19,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:26:19,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:26:19,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:26:19,503 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:26:19,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:26:19,538 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:26:19,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:26:19,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:26:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:19,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:19,592 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:26:19,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:26:19,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:26:19,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:26:21,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25091#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:26:21,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:26:21,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:26:21,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-12-14 10:26:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613841732] [2022-12-14 10:26:21,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 10:26:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:26:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 10:26:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:26:21,357 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 10:26:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:22,032 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2022-12-14 10:26:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 10:26:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 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 116 [2022-12-14 10:26:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:22,034 INFO L225 Difference]: With dead ends: 297 [2022-12-14 10:26:22,034 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 10:26:22,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 220 SyntacticMatches, 111 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5066 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=517, Invalid=2135, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 10:26:22,035 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:22,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:26:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 10:26:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-12-14 10:26:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 10:26:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2022-12-14 10:26:22,152 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 116 [2022-12-14 10:26:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:22,153 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2022-12-14 10:26:22,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 10:26:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2022-12-14 10:26:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 10:26:22,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:22,154 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:26:22,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:22,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:22,355 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:26:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1036595033, now seen corresponding path program 24 times [2022-12-14 10:26:22,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:26:22,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438780350] [2022-12-14 10:26:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:26:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:27:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 56 proven. 549 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:09,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:27:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438780350] [2022-12-14 10:27:09,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438780350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:27:09,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978364227] [2022-12-14 10:27:09,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:27:09,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:09,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:27:09,126 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:27:09,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 10:27:09,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:27:09,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:27:09,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 412 conjunts are in the unsatisfiable core [2022-12-14 10:27:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:09,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:27:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:27:18,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 10:27:24,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978364227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659627332] [2022-12-14 10:27:24,529 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:27:24,530 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:27:24,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:27:24,530 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:27:24,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:27:24,568 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:27:24,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:27:24,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 10:27:24,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:27:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:27:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:27:24,642 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:27:24,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 248 [2022-12-14 10:27:24,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:27:24,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:27:25,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26841#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:27:25,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:27:25,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:27:25,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 26, 25] total 144 [2022-12-14 10:27:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135117990] [2022-12-14 10:27:25,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:27:25,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-12-14 10:27:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:27:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-12-14 10:27:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=21175, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 10:27:25,721 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 144 states, 144 states have (on average 2.4375) internal successors, (351), 144 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 10:28:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:28:04,481 INFO L93 Difference]: Finished difference Result 390 states and 429 transitions. [2022-12-14 10:28:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 10:28:04,481 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.4375) internal successors, (351), 144 states have internal predecessors, (351), 0 states have call successors, (0), 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 125 [2022-12-14 10:28:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:28:04,482 INFO L225 Difference]: With dead ends: 390 [2022-12-14 10:28:04,482 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 10:28:04,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 296 SyntacticMatches, 54 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18686 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=3499, Invalid=46901, Unknown=0, NotChecked=0, Total=50400 [2022-12-14 10:28:04,484 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 259 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 10993 mSolverCounterSat, 3144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 14137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3144 IncrementalHoareTripleChecker+Valid, 10993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:28:04,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 105 Invalid, 14137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3144 Valid, 10993 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-12-14 10:28:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 10:28:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2022-12-14 10:28:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 10:28:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2022-12-14 10:28:04,633 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 125 [2022-12-14 10:28:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:28:04,633 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2022-12-14 10:28:04,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.4375) internal successors, (351), 144 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 10:28:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2022-12-14 10:28:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 10:28:04,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:28:04,634 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:28:04,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 10:28:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 10:28:04,834 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:28:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:28:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1442813421, now seen corresponding path program 25 times [2022-12-14 10:28:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:28:04,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784510912] [2022-12-14 10:28:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:28:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-12-14 10:28:05,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:28:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784510912] [2022-12-14 10:28:05,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784510912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57680273] [2022-12-14 10:28:05,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:28:05,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:05,306 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:05,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 10:28:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:28:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-12-14 10:28:05,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-12-14 10:28:05,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57680273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:28:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045378812] [2022-12-14 10:28:05,764 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:28:05,764 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:28:05,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:28:05,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:28:05,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:28:05,801 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 10:28:05,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 10:28:05,838 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:28:05,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 10:28:05,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:28:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:05,901 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:28:05,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2022-12-14 10:28:05,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:28:06,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:28:06,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28854#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:28:06,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:28:06,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:28:06,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-12-14 10:28:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436175558] [2022-12-14 10:28:06,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:28:06,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 10:28:06,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:28:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 10:28:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:28:06,257 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:28:07,179 INFO L93 Difference]: Finished difference Result 236 states and 266 transitions. [2022-12-14 10:28:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:28:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-12-14 10:28:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:28:07,181 INFO L225 Difference]: With dead ends: 236 [2022-12-14 10:28:07,181 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 10:28:07,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 353 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=2477, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 10:28:07,182 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:28:07,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:28:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 10:28:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-12-14 10:28:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 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 10:28:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2022-12-14 10:28:07,326 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 131 [2022-12-14 10:28:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:28:07,326 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2022-12-14 10:28:07,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:28:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2022-12-14 10:28:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 10:28:07,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:28:07,326 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:28:07,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 10:28:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 10:28:07,527 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:28:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:28:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash 998612227, now seen corresponding path program 26 times [2022-12-14 10:28:07,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:28:07,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598671510] [2022-12-14 10:28:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:28:07,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:28:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:29:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 80 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:29:08,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:29:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598671510] [2022-12-14 10:29:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598671510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:29:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436872690] [2022-12-14 10:29:08,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:29:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:29:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:29:08,263 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:29:08,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 10:29:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 10:29:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:29:08,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 483 conjunts are in the unsatisfiable core [2022-12-14 10:29:08,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:29:08,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:29:08,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:29:08,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:29:32,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:32,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:29:32,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 215 [2022-12-14 10:29:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 10 proven. 671 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 10:29:33,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:30:21,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 312 [2022-12-14 10:31:17,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 4404991 column 7: canceled [2022-12-14 10:31:17,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603066124] [2022-12-14 10:31:17,010 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:31:17,010 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:17,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:17,010 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:17,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:19,038 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 4404993 column 7: canceled at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 10:31:19,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:31:19,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2022-12-14 10:31:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209450909] [2022-12-14 10:31:19,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-12-14 10:31:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-12-14 10:31:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=44043, Unknown=0, NotChecked=0, Total=46010 [2022-12-14 10:31:19,044 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 110 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 10:31:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:31:21,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 123 SyntacticMatches, 59 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24611 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=1967, Invalid=44043, Unknown=0, NotChecked=0, Total=46010 [2022-12-14 10:31:21,256 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:21,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:21,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 10:31:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:21,457 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 4404995 column 7: canceled at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.push(ManagedScript.java:124) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:366) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 10:31:21,463 INFO L158 Benchmark]: Toolchain (without parser) took 629582.34ms. Allocated memory was 180.4MB in the beginning and 9.4GB in the end (delta: 9.3GB). Free memory was 118.3MB in the beginning and 5.8GB in the end (delta: -5.7GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. [2022-12-14 10:31:21,463 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 98.6MB. Free memory is still 61.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:31:21,463 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.00ms. Allocated memory is still 180.4MB. Free memory was 118.0MB in the beginning and 106.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:31:21,464 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.32ms. Allocated memory is still 180.4MB. Free memory was 106.9MB in the beginning and 105.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:31:21,464 INFO L158 Benchmark]: Boogie Preprocessor took 20.38ms. Allocated memory is still 180.4MB. Free memory was 105.1MB in the beginning and 103.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:31:21,464 INFO L158 Benchmark]: RCFGBuilder took 384.61ms. Allocated memory is still 180.4MB. Free memory was 103.6MB in the beginning and 84.4MB in the end (delta: 19.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-12-14 10:31:21,464 INFO L158 Benchmark]: TraceAbstraction took 628970.38ms. Allocated memory was 180.4MB in the beginning and 9.4GB in the end (delta: 9.3GB). Free memory was 83.8MB in the beginning and 5.8GB in the end (delta: -5.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. [2022-12-14 10:31:21,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 98.6MB. Free memory is still 61.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.00ms. Allocated memory is still 180.4MB. Free memory was 118.0MB in the beginning and 106.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.32ms. Allocated memory is still 180.4MB. Free memory was 106.9MB in the beginning and 105.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.38ms. Allocated memory is still 180.4MB. Free memory was 105.1MB in the beginning and 103.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 384.61ms. Allocated memory is still 180.4MB. Free memory was 103.6MB in the beginning and 84.4MB in the end (delta: 19.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 628970.38ms. Allocated memory was 180.4MB in the beginning and 9.4GB in the end (delta: 9.3GB). Free memory was 83.8MB in the beginning and 5.8GB in the end (delta: -5.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 4404995 column 7: canceled de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 4404995 column 7: canceled: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-12-14 10:31:21,669 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-12-14 10:31:21,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/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_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- 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 10:31:23,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:31:23,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:31:23,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:31:23,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:31:23,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:31:23,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:31:23,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:31:23,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:31:23,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:31:23,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:31:23,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:31:23,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:31:23,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:31:23,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:31:23,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:31:23,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:31:23,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:31:23,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:31:23,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:31:23,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:31:23,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:31:23,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:31:23,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:31:23,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:31:23,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:31:23,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:31:23,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:31:23,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:31:23,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:31:23,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:31:23,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:31:23,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:31:23,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:31:23,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:31:23,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:31:23,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:31:23,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:31:23,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:31:23,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:31:23,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:31:23,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 10:31:23,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:31:23,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:31:23,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:31:23,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:31:23,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:31:23,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:31:23,665 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:31:23,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:31:23,665 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:31:23,665 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:31:23,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:31:23,665 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:31:23,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:31:23,666 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:31:23,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:31:23,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:31:23,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:31:23,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:31:23,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:31:23,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:31:23,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:31:23,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:31:23,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:31:23,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:31:23,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:31:23,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:31:23,675 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:31:23,676 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:31:23,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:31:23,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:31:23,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:31:23,676 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_108f6219-d2a4-41c9-b0bf-8b318cfed768/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2022-12-14 10:31:23,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:31:23,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:31:23,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:31:23,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:31:23,923 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:31:23,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-12-14 10:31:26,531 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:31:26,685 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:31:26,685 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-12-14 10:31:26,690 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data/1d5e718e1/2e6b39ac87374f8098ed6097e0f5e8c1/FLAG00c73d0dd [2022-12-14 10:31:26,701 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/data/1d5e718e1/2e6b39ac87374f8098ed6097e0f5e8c1 [2022-12-14 10:31:26,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:31:26,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:31:26,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:31:26,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:31:26,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:31:26,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ecd07be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26, skipping insertion in model container [2022-12-14 10:31:26,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:31:26,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:31:26,857 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-12-14 10:31:26,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:31:26,889 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:31:26,902 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-12-14 10:31:26,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:31:26,928 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:31:26,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26 WrapperNode [2022-12-14 10:31:26,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:31:26,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:31:26,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:31:26,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:31:26,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,966 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2022-12-14 10:31:26,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:31:26,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:31:26,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:31:26,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:31:26,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,995 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:26,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:31:26,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:31:26,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:31:27,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:31:27,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (1/1) ... [2022-12-14 10:31:27,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:31:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:27,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:31:27,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:31:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:31:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:31:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:31:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 10:31:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:31:27,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:31:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 10:31:27,144 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:31:27,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:31:27,388 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:31:27,393 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:31:27,393 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 10:31:27,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:31:27 BoogieIcfgContainer [2022-12-14 10:31:27,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:31:27,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:31:27,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:31:27,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:31:27,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:31:26" (1/3) ... [2022-12-14 10:31:27,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757df792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:31:27, skipping insertion in model container [2022-12-14 10:31:27,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:26" (2/3) ... [2022-12-14 10:31:27,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757df792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:31:27, skipping insertion in model container [2022-12-14 10:31:27,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:31:27" (3/3) ... [2022-12-14 10:31:27,401 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-12-14 10:31:27,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:31:27,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:31:27,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:31:27,452 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2142b585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:31:27,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:31:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 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 10:31:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:31:27,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:27,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:27,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-12-14 10:31:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:31:27,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201964993] [2022-12-14 10:31:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:27,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:27,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:31:27,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:31:27,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 10:31:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 10:31:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:27,580 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 10:31:27,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:31:27,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:31:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201964993] [2022-12-14 10:31:27,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201964993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:27,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:31:27,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:31:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769781014] [2022-12-14 10:31:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:31:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:31:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:31:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:31:27,611 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 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) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 10:31:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:27,625 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-12-14 10:31:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:31:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 10:31:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:27,636 INFO L225 Difference]: With dead ends: 83 [2022-12-14 10:31:27,636 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 10:31:27,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:31:27,640 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:27,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 10:31:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 10:31:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 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 10:31:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-12-14 10:31:27,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-12-14 10:31:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:27,663 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-12-14 10:31:27,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 10:31:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-12-14 10:31:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:31:27,664 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:27,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:27,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:31:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:27,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-12-14 10:31:27,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:31:27,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226205035] [2022-12-14 10:31:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:27,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:31:27,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:31:27,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 10:31:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:31:27,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:28,068 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 10:31:28,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:31:28,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:31:28,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226205035] [2022-12-14 10:31:28,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226205035] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:28,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:31:28,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:31:28,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78580608] [2022-12-14 10:31:28,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:28,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:31:28,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:31:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:31:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:31:28,071 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 10:31:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:28,145 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-12-14 10:31:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:31:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 10:31:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:28,147 INFO L225 Difference]: With dead ends: 62 [2022-12-14 10:31:28,147 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 10:31:28,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 10:31:28,149 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:28,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 107 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:31:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 10:31:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 10:31:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 10:31:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2022-12-14 10:31:28,155 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2022-12-14 10:31:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:28,156 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2022-12-14 10:31:28,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 10:31:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2022-12-14 10:31:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 10:31:28,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:28,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:28,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 10:31:28,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:28,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2022-12-14 10:31:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:31:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160059609] [2022-12-14 10:31:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:28,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:28,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:31:28,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:31:28,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 10:31:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:31:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:31:28,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:31:28,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:31:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160059609] [2022-12-14 10:31:28,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160059609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:28,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:31:28,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:31:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593931813] [2022-12-14 10:31:28,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:28,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:31:28,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:31:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:31:28,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:31:28,602 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 10:31:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:28,742 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2022-12-14 10:31:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:31:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) Word has length 29 [2022-12-14 10:31:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:28,744 INFO L225 Difference]: With dead ends: 113 [2022-12-14 10:31:28,744 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 10:31:28,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 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 10:31:28,746 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:28,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 49 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:31:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 10:31:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-12-14 10:31:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 10:31:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2022-12-14 10:31:28,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29 [2022-12-14 10:31:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:28,756 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2022-12-14 10:31:28,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 10:31:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2022-12-14 10:31:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 10:31:28,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:28,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:28,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 10:31:28,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:28,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1139067424, now seen corresponding path program 1 times [2022-12-14 10:31:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:31:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032503889] [2022-12-14 10:31:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:28,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:31:28,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:31:28,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 10:31:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:31:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:31:29,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:31:29,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:31:29,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032503889] [2022-12-14 10:31:29,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032503889] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:29,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926769748] [2022-12-14 10:31:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:31:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:31:29,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:31:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 10:31:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:29,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:31:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:31:29,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:31:29,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [926769748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211574739] [2022-12-14 10:31:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:29,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:29,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:29,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:31:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:31:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:31:29,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:31:29,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211574739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:29,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 10:31:29,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4] total 8 [2022-12-14 10:31:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960028574] [2022-12-14 10:31:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:31:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:31:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:31:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:31:29,415 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 10:31:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:29,601 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2022-12-14 10:31:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:31:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) Word has length 31 [2022-12-14 10:31:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:29,602 INFO L225 Difference]: With dead ends: 109 [2022-12-14 10:31:29,602 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 10:31:29,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:31:29,603 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:29,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 18 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:31:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 10:31:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-12-14 10:31:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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 10:31:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-12-14 10:31:29,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2022-12-14 10:31:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:29,609 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-12-14 10:31:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 10:31:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-12-14 10:31:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 10:31:29,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:29,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:29,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:31:29,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-12-14 10:31:30,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-12-14 10:31:30,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:30,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:30,214 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-12-14 10:31:30,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:31:30,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721048585] [2022-12-14 10:31:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:31:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:31:30,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:31:30,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 10:31:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:31:30,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:30,340 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 10:31:30,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-14 10:31:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:31:30,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:31:30,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:31:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721048585] [2022-12-14 10:31:30,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721048585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576889624] [2022-12-14 10:31:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:30,900 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:31:30,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:31:30,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:31:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 10:31:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:31:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:31:31,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:31:31,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [576889624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:31,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530234206] [2022-12-14 10:31:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:31,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:31,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:31,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:31:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:31:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:31:31,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:31:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530234206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:31,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:31:31,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4, 4, 4, 4] total 18 [2022-12-14 10:31:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104160251] [2022-12-14 10:31:31,275 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:31:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:31:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:31:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:31:31,277 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 10:31:33,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:35,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:37,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:39,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:41,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:43,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:45,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:47,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:49,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:52,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:54,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:56,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:31:58,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:32:00,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:32:02,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:32:04,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:32:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:04,300 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2022-12-14 10:32:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:32:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 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 10:32:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:04,301 INFO L225 Difference]: With dead ends: 137 [2022-12-14 10:32:04,302 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 10:32:04,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 263 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:32:04,303 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 32 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:04,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 151 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 515 Invalid, 16 Unknown, 0 Unchecked, 32.6s Time] [2022-12-14 10:32:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 10:32:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-12-14 10:32:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 88 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 10:32:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-12-14 10:32:04,312 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 49 [2022-12-14 10:32:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:04,313 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-12-14 10:32:04,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 10:32:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-12-14 10:32:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:32:04,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:04,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:04,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 10:32:04,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:32:04,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 10:32:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:04,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash -636797034, now seen corresponding path program 2 times [2022-12-14 10:32:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823623452] [2022-12-14 10:32:04,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:32:04,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:04,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:04,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 10:32:05,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:32:05,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:32:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:32:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:32:05,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823623452] [2022-12-14 10:32:05,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823623452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194917779] [2022-12-14 10:32:05,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:32:05,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:05,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:05,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:05,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 10:32:05,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:32:05,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:32:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:32:05,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:32:05,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [194917779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:05,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093621972] [2022-12-14 10:32:05,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:32:05,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:05,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:05,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:32:05,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:32:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:32:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:32:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:32:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093621972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:05,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:32:05,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 5, 5] total 16 [2022-12-14 10:32:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003125807] [2022-12-14 10:32:05,622 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:05,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:32:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:32:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:32:05,623 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 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 10:32:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:06,256 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2022-12-14 10:32:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:32:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 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 53 [2022-12-14 10:32:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:06,258 INFO L225 Difference]: With dead ends: 246 [2022-12-14 10:32:06,258 INFO L226 Difference]: Without dead ends: 169 [2022-12-14 10:32:06,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:32:06,259 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 510 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:06,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 37 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:32:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-14 10:32:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2022-12-14 10:32:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1390728476821192) internal successors, (172), 151 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 10:32:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2022-12-14 10:32:06,271 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 53 [2022-12-14 10:32:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:06,272 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2022-12-14 10:32:06,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 10:32:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2022-12-14 10:32:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:32:06,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:06,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:06,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:06,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 10:32:06,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:06,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:06,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-12-14 10:32:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:06,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559686400] [2022-12-14 10:32:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:06,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:06,880 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:06,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 10:32:07,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:32:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 10:32:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:07,277 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 10:32:08,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:08,018 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 39 treesize of output 13 [2022-12-14 10:32:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:08,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:32:13,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:13,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559686400] [2022-12-14 10:32:13,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559686400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:13,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2102556345] [2022-12-14 10:32:13,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:13,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:13,157 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:13,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 10:32:13,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:32:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792760894] [2022-12-14 10:32:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:13,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:13,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:13,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 1 [2022-12-14 10:32:13,328 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:13,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:32:13,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:32:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 10:32:13,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:13,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:32:13,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:13,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 10:32:15,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:15,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-12-14 10:32:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:15,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:32:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792760894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:15,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 10:32:15,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13, 11] total 32 [2022-12-14 10:32:15,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968385229] [2022-12-14 10:32:15,912 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:32:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:32:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=865, Unknown=2, NotChecked=0, Total=992 [2022-12-14 10:32:15,915 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand has 32 states, 32 states have (on average 6.3125) internal successors, (202), 32 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 10:32:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:16,802 INFO L93 Difference]: Finished difference Result 204 states and 223 transitions. [2022-12-14 10:32:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:32:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.3125) internal successors, (202), 32 states have internal predecessors, (202), 0 states have call successors, (0), 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 71 [2022-12-14 10:32:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:16,804 INFO L225 Difference]: With dead ends: 204 [2022-12-14 10:32:16,804 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 10:32:16,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 218 SyntacticMatches, 32 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=141, Invalid=979, Unknown=2, NotChecked=0, Total=1122 [2022-12-14 10:32:16,806 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:16,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:32:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 10:32:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-12-14 10:32:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 10:32:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2022-12-14 10:32:16,814 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 71 [2022-12-14 10:32:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:16,814 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2022-12-14 10:32:16,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.3125) internal successors, (202), 32 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 10:32:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2022-12-14 10:32:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:32:16,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:16,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:16,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:17,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 10:32:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:17,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 4 times [2022-12-14 10:32:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:17,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458141990] [2022-12-14 10:32:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:32:17,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:17,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:17,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:17,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:32:17,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:32:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:32:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:32:17,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:32:17,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458141990] [2022-12-14 10:32:17,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458141990] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:17,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412207741] [2022-12-14 10:32:17,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:32:17,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:17,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:17,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:17,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 10:32:18,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:32:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:32:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:32:18,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:32:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412207741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612548857] [2022-12-14 10:32:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:32:18,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:18,223 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:18,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:32:18,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:32:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:32:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:32:18,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 10:32:18,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612548857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:18,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:32:18,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 21 [2022-12-14 10:32:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153868794] [2022-12-14 10:32:18,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 10:32:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 10:32:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:32:18,478 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:20,139 INFO L93 Difference]: Finished difference Result 305 states and 360 transitions. [2022-12-14 10:32:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:32:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-14 10:32:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:20,140 INFO L225 Difference]: With dead ends: 305 [2022-12-14 10:32:20,140 INFO L226 Difference]: Without dead ends: 181 [2022-12-14 10:32:20,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 423 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:32:20,141 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 574 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:20,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 49 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:32:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-14 10:32:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2022-12-14 10:32:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0685714285714285) internal successors, (187), 175 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 10:32:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 187 transitions. [2022-12-14 10:32:20,151 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 187 transitions. Word has length 75 [2022-12-14 10:32:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:20,151 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 187 transitions. [2022-12-14 10:32:20,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 187 transitions. [2022-12-14 10:32:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 10:32:20,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:20,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:20,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 10:32:20,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:20,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 10:32:20,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:20,755 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 5 times [2022-12-14 10:32:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:20,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9383325] [2022-12-14 10:32:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:32:20,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:20,759 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:20,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 10:32:21,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 10:32:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 10:32:21,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:21,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:32:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:21,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 10:32:21,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:21,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:21,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 10:32:22,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:22,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2022-12-14 10:32:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:22,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:32:25,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9383325] [2022-12-14 10:32:25,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9383325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1958551469] [2022-12-14 10:32:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:32:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:25,235 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:25,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 10:32:26,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 10:32:26,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:26,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 10:32:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:26,517 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 15 treesize of output 11 [2022-12-14 10:32:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:26,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 10:32:26,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:26,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:26,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 10:32:28,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:28,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2022-12-14 10:32:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:32:28,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1958551469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846487541] [2022-12-14 10:32:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:32:28,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:28,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:28,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 10:32:29,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 10:32:29,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 10:32:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:29,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:32:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:29,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 10:32:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:29,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:29,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 10:32:31,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:32:31,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2022-12-14 10:32:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:31,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:32:31,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846487541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:31,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:32:31,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 19, 15, 19, 15] total 31 [2022-12-14 10:32:31,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874675852] [2022-12-14 10:32:31,904 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:32:31,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:32:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:32:31,905 INFO L87 Difference]: Start difference. First operand 176 states and 187 transitions. Second operand has 31 states, 31 states have (on average 5.709677419354839) internal successors, (177), 31 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:32:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:33,972 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2022-12-14 10:32:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:32:33,973 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.709677419354839) internal successors, (177), 31 states have internal predecessors, (177), 0 states have call successors, (0), 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 93 [2022-12-14 10:32:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:33,973 INFO L225 Difference]: With dead ends: 254 [2022-12-14 10:32:33,973 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 10:32:33,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 446 SyntacticMatches, 77 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:32:33,974 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:33,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 182 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 10:32:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 10:32:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2022-12-14 10:32:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 164 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 10:32:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2022-12-14 10:32:33,988 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 93 [2022-12-14 10:32:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:33,988 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2022-12-14 10:32:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.709677419354839) internal successors, (177), 31 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 10:32:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2022-12-14 10:32:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 10:32:33,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:33,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:33,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:34,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 10:32:34,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 10:32:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:34,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -132149886, now seen corresponding path program 6 times [2022-12-14 10:32:34,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:34,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688514538] [2022-12-14 10:32:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:32:34,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:34,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:34,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 10:32:34,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 10:32:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:32:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:32:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:32:35,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688514538] [2022-12-14 10:32:35,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688514538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269849245] [2022-12-14 10:32:35,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:32:35,617 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:35,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:35,618 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:35,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 10:32:35,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 10:32:35,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:32:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:32:36,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:32:36,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269849245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002236637] [2022-12-14 10:32:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:32:36,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:36,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:36,272 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:36,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 10:32:36,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 10:32:36,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:36,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:32:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:32:36,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:32:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002236637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:36,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:32:36,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11, 11] total 26 [2022-12-14 10:32:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678742243] [2022-12-14 10:32:36,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:36,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:32:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:32:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:32:36,631 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 10:32:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:37,417 INFO L93 Difference]: Finished difference Result 264 states and 300 transitions. [2022-12-14 10:32:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:32:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 0 states have call successors, (0), 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 97 [2022-12-14 10:32:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:37,418 INFO L225 Difference]: With dead ends: 264 [2022-12-14 10:32:37,418 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 10:32:37,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 10:32:37,420 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:37,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 42 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:32:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 10:32:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2022-12-14 10:32:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 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 10:32:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-12-14 10:32:37,432 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2022-12-14 10:32:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:37,432 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-12-14 10:32:37,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 10:32:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-12-14 10:32:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 10:32:37,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:37,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:37,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 10:32:37,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 10:32:37,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 10:32:38,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:38,037 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:38,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 7 times [2022-12-14 10:32:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:38,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848866774] [2022-12-14 10:32:38,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:32:38,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:32:38,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:38,040 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:32:38,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108f6219-d2a4-41c9-b0bf-8b318cfed768/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process