./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/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_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/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_988b76c1-6b26-4639-b43b-9056171b8d7a/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 fb960067570884de0638f14e8f74b0912d9ff4ed83f9c3c33e6cd3e420d05661 --- 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 10:09:47,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:09:47,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:09:47,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:09:47,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:09:47,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:09:47,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:09:47,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:09:47,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:09:47,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:09:47,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:09:47,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:09:47,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:09:47,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:09:47,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:09:47,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:09:47,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:09:47,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:09:47,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:09:47,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:09:47,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:09:47,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:09:47,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:09:47,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:09:47,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:09:47,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:09:47,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:09:47,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:09:47,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:09:47,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:09:47,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:09:47,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:09:47,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:09:47,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:09:47,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:09:47,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:09:47,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:09:47,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:09:47,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:09:47,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:09:47,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:09:47,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:09:47,624 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:09:47,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:09:47,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:09:47,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:09:47,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:09:47,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:09:47,625 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:09:47,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:09:47,626 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:09:47,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:09:47,626 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:09:47,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:09:47,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:09:47,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:09:47,627 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:09:47,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:09:47,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:09:47,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:09:47,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:09:47,628 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:09:47,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:09:47,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:09:47,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:09:47,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:09:47,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:09:47,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:09:47,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:09:47,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:09:47,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:09:47,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:09:47,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:09:47,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:09:47,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:09:47,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:09:47,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:09:47,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:09:47,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:09:47,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:09:47,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:09:47,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:09:47,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:09:47,631 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_988b76c1-6b26-4639-b43b-9056171b8d7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb960067570884de0638f14e8f74b0912d9ff4ed83f9c3c33e6cd3e420d05661 [2022-12-14 10:09:47,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:09:47,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:09:47,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:09:47,816 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:09:47,816 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:09:47,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2022-12-14 10:09:50,381 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:09:50,542 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:09:50,542 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2022-12-14 10:09:50,547 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/data/e8cadbfeb/df1ae975fb0048cdbc85c37bb51a286c/FLAGe5af38668 [2022-12-14 10:09:50,959 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/data/e8cadbfeb/df1ae975fb0048cdbc85c37bb51a286c [2022-12-14 10:09:50,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:09:50,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:09:50,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:09:50,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:09:50,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:09:50,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:09:50" (1/1) ... [2022-12-14 10:09:50,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a309c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:50, skipping insertion in model container [2022-12-14 10:09:50,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:09:50" (1/1) ... [2022-12-14 10:09:50,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:09:50,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:09:51,101 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_988b76c1-6b26-4639-b43b-9056171b8d7a/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i[814,827] [2022-12-14 10:09:51,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:09:51,118 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:09:51,128 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_988b76c1-6b26-4639-b43b-9056171b8d7a/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i[814,827] [2022-12-14 10:09:51,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:09:51,143 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:09:51,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51 WrapperNode [2022-12-14 10:09:51,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:09:51,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:09:51,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:09:51,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:09:51,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,169 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-12-14 10:09:51,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:09:51,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:09:51,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:09:51,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:09:51,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,185 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:09:51,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:09:51,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:09:51,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:09:51,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (1/1) ... [2022-12-14 10:09:51,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:09:51,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:51,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:09:51,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:09:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:09:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:09:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:09:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:09:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:09:51,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:09:51,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:09:51,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:09:51,322 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:09:51,324 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:09:51,418 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:09:51,453 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:09:51,453 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:09:51,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:09:51 BoogieIcfgContainer [2022-12-14 10:09:51,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:09:51,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:09:51,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:09:51,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:09:51,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:09:50" (1/3) ... [2022-12-14 10:09:51,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a01ba75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:09:51, skipping insertion in model container [2022-12-14 10:09:51,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:09:51" (2/3) ... [2022-12-14 10:09:51,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a01ba75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:09:51, skipping insertion in model container [2022-12-14 10:09:51,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:09:51" (3/3) ... [2022-12-14 10:09:51,465 INFO L112 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2022-12-14 10:09:51,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:09:51,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:09:51,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:09:51,538 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;@704c1aab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:09:51,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:09:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:09:51,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:51,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:09:51,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash 77361366, now seen corresponding path program 1 times [2022-12-14 10:09:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545134168] [2022-12-14 10:09:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:51,756 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 10:09:51,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:51,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545134168] [2022-12-14 10:09:51,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545134168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:51,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:51,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:09:51,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063426176] [2022-12-14 10:09:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:51,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:09:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:09:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:09:51,792 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:51,827 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-12-14 10:09:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:51,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:09:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:51,835 INFO L225 Difference]: With dead ends: 20 [2022-12-14 10:09:51,835 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 10:09:51,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:09:51,840 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:51,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 10:09:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2022-12-14 10:09:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 10:09:51,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-12-14 10:09:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:51,862 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 10:09:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 10:09:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:09:51,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:51,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:09:51,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:09:51,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1899568220, now seen corresponding path program 1 times [2022-12-14 10:09:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:51,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380957449] [2022-12-14 10:09:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:51,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:51,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380957449] [2022-12-14 10:09:51,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380957449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:51,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487795208] [2022-12-14 10:09:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:51,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:51,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:51,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:09:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:52,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:52,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487795208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866699927] [2022-12-14 10:09:52,041 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:09:52,042 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:09:52,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:09:52,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:09:52,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:09:52,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:52,141 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:09:52,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:09:52,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:52,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:09:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:52,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:09:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:52,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:09:52,304 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:09:52,305 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 177 treesize of output 180 [2022-12-14 10:09:52,378 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 10:09:52,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:09:52,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:09:52,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:09:52,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:52,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 10:09:52,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38953019] [2022-12-14 10:09:52,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:52,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:09:52,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:09:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:09:52,464 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:52,496 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-12-14 10:09:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:09:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:52,497 INFO L225 Difference]: With dead ends: 32 [2022-12-14 10:09:52,497 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 10:09:52,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:09:52,499 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:52,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 10:09:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2022-12-14 10:09:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-12-14 10:09:52,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-12-14 10:09:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:52,502 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-12-14 10:09:52,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-12-14 10:09:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:09:52,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:52,502 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-14 10:09:52,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:52,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:52,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1963570262, now seen corresponding path program 2 times [2022-12-14 10:09:52,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:52,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925441320] [2022-12-14 10:09:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:52,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:52,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:52,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925441320] [2022-12-14 10:09:52,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925441320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:52,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100423253] [2022-12-14 10:09:52,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:52,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:52,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:52,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:52,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:09:52,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:09:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:09:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:52,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100423253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504952913] [2022-12-14 10:09:53,012 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:09:53,012 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:09:53,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:09:53,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:09:53,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:09:53,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:53,037 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:09:53,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:09:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:53,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:09:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:53,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:09:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:53,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:09:53,133 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:09:53,134 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 177 treesize of output 180 [2022-12-14 10:09:53,185 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 10:09:53,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:09:53,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:09:53,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:09:53,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:53,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 10:09:53,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524854189] [2022-12-14 10:09:53,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:53,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:09:53,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:09:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:09:53,250 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:53,306 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-12-14 10:09:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:09:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:09:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:53,307 INFO L225 Difference]: With dead ends: 68 [2022-12-14 10:09:53,307 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 10:09:53,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:09:53,308 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:53,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 10:09:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2022-12-14 10:09:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-12-14 10:09:53,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-12-14 10:09:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:53,314 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-12-14 10:09:53,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-12-14 10:09:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:09:53,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:53,315 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-14 10:09:53,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:09:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 10:09:53,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1285434986, now seen corresponding path program 3 times [2022-12-14 10:09:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963282485] [2022-12-14 10:09:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:53,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:53,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:53,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963282485] [2022-12-14 10:09:53,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963282485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753309675] [2022-12-14 10:09:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:09:53,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:53,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:53,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:09:53,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:09:53,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:53,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:09:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:53,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:54,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753309675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276385040] [2022-12-14 10:09:54,090 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:09:54,090 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:09:54,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:09:54,091 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:09:54,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:09:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:54,117 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:09:54,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:09:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:54,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:09:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:54,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:09:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:54,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:09:54,181 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:09:54,182 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 177 treesize of output 180 [2022-12-14 10:09:54,217 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 10:09:54,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:09:54,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:09:54,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:09:54,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 10:09:54,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953194971] [2022-12-14 10:09:54,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:54,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:09:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:09:54,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:09:54,287 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 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 10:09:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:54,446 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-12-14 10:09:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:09:54,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 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 15 [2022-12-14 10:09:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:54,448 INFO L225 Difference]: With dead ends: 140 [2022-12-14 10:09:54,449 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 10:09:54,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:09:54,450 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:54,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 10:09:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2022-12-14 10:09:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-12-14 10:09:54,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2022-12-14 10:09:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:54,455 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-12-14 10:09:54,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 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 10:09:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-12-14 10:09:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:09:54,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:54,457 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-12-14 10:09:54,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:09:54,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:54,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash 282410006, now seen corresponding path program 4 times [2022-12-14 10:09:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:54,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365444180] [2022-12-14 10:09:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:55,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:55,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365444180] [2022-12-14 10:09:55,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365444180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:55,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491153886] [2022-12-14 10:09:55,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:09:55,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:55,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:55,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:55,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:09:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:09:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:55,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:55,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491153886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:55,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [623258568] [2022-12-14 10:09:55,663 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:09:55,663 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:09:55,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:09:55,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:09:55,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:09:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:55,684 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:09:55,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:09:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:55,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:09:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:55,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:09:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:55,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:55,740 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:09:55,741 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 182 treesize of output 179 [2022-12-14 10:09:55,768 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 10:09:55,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:09:55,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '894#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:09:55,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:09:55,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:09:55,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 10:09:55,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795130248] [2022-12-14 10:09:55,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:55,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 10:09:55,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 10:09:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:09:55,871 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:56,153 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2022-12-14 10:09:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 10:09:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 10:09:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:56,156 INFO L225 Difference]: With dead ends: 284 [2022-12-14 10:09:56,156 INFO L226 Difference]: Without dead ends: 279 [2022-12-14 10:09:56,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:09:56,159 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:56,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:09:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-14 10:09:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2022-12-14 10:09:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-12-14 10:09:56,167 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-12-14 10:09:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:56,167 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-12-14 10:09:56,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-12-14 10:09:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 10:09:56,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:56,168 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-12-14 10:09:56,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:09:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:56,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1752748310, now seen corresponding path program 5 times [2022-12-14 10:09:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:56,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035192313] [2022-12-14 10:09:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:56,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:57,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035192313] [2022-12-14 10:09:57,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035192313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925053312] [2022-12-14 10:09:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:57,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:57,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:57,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:11:30,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 10:11:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:30,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 10:11:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:30,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:31,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925053312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:31,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493407419] [2022-12-14 10:11:31,988 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:11:31,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:11:31,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:11:31,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:11:31,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:11:31,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:32,005 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:11:32,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-12-14 10:11:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:32,022 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:11:32,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:11:32,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:32,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:11:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:32,076 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:11:32,077 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 182 treesize of output 179 [2022-12-14 10:11:32,106 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 10:11:32,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:11:32,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:11:32,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:11:32,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:11:32,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-12-14 10:11:32,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780750809] [2022-12-14 10:11:32,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:11:32,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 10:11:32,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:11:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 10:11:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 10:11:32,217 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:11:33,654 INFO L93 Difference]: Finished difference Result 572 states and 621 transitions. [2022-12-14 10:11:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 10:11:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 10:11:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:11:33,657 INFO L225 Difference]: With dead ends: 572 [2022-12-14 10:11:33,657 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 10:11:33,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 10:11:33,659 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:11:33,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 285 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:11:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 10:11:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 101. [2022-12-14 10:11:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-12-14 10:11:33,673 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2022-12-14 10:11:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:11:33,674 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-12-14 10:11:33,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-12-14 10:11:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 10:11:33,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:11:33,680 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2022-12-14 10:11:33,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:11:33,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:11:33,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:11:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:11:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1613953814, now seen corresponding path program 6 times [2022-12-14 10:11:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:11:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068738385] [2022-12-14 10:11:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:11:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:11:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:11:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:37,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:11:37,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068738385] [2022-12-14 10:11:37,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068738385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:11:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515734456] [2022-12-14 10:11:37,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:11:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:11:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:11:37,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:11:37,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:11:37,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:11:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 10:11:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:38,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:44,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515734456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393719603] [2022-12-14 10:11:44,812 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:11:44,812 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:11:44,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:11:44,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:11:44,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:11:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:44,827 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:11:44,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-12-14 10:11:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:44,844 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:11:44,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:11:44,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:44,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:11:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:11:44,887 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:11:44,887 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 182 treesize of output 179 [2022-12-14 10:11:44,913 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 10:11:44,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:11:45,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3520#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:11:45,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:11:45,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:11:45,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 10:11:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113528274] [2022-12-14 10:11:45,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:11:45,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 10:11:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:11:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 10:11:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 10:11:45,055 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:00,089 INFO L93 Difference]: Finished difference Result 1148 states and 1245 transitions. [2022-12-14 10:12:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 10:12:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 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 99 [2022-12-14 10:12:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:00,092 INFO L225 Difference]: With dead ends: 1148 [2022-12-14 10:12:00,092 INFO L226 Difference]: Without dead ends: 1143 [2022-12-14 10:12:00,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 10:12:00,095 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3064 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:00,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3064 Valid, 570 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:12:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-12-14 10:12:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 197. [2022-12-14 10:12:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-12-14 10:12:00,110 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2022-12-14 10:12:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:00,110 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-12-14 10:12:00,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-12-14 10:12:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 10:12:00,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:00,112 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2022-12-14 10:12:00,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:12:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:12:00,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:12:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1653387498, now seen corresponding path program 7 times [2022-12-14 10:12:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:12:00,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144111388] [2022-12-14 10:12:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:12:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:12:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:12,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:12:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144111388] [2022-12-14 10:12:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144111388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:12:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887203235] [2022-12-14 10:12:12,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:12:12,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:12,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:12,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:12:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:12:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 10:12:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:13,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:38,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887203235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992040115] [2022-12-14 10:12:38,165 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:12:38,165 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:12:38,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:12:38,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:12:38,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:12:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:12:38,181 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:12:38,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:12:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:12:38,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:12:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:12:38,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 10:12:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:12:38,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:12:38,232 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:12:38,232 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 177 treesize of output 180 [2022-12-14 10:12:38,254 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 10:12:38,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:12:38,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6993#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:12:38,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:12:38,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:12:38,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 10:12:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992452115] [2022-12-14 10:12:38,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 10:12:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:12:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 10:12:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 10:12:38,379 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:04,526 INFO L93 Difference]: Finished difference Result 2300 states and 2493 transitions. [2022-12-14 10:16:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 10:16:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 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 195 [2022-12-14 10:16:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:04,530 INFO L225 Difference]: With dead ends: 2300 [2022-12-14 10:16:04,531 INFO L226 Difference]: Without dead ends: 2295 [2022-12-14 10:16:04,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 10:16:04,537 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8664 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2168 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:04,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8664 Valid, 1146 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2168 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 10:16:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-12-14 10:16:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 389. [2022-12-14 10:16:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2022-12-14 10:16:04,554 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2022-12-14 10:16:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:04,554 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2022-12-14 10:16:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2022-12-14 10:16:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-12-14 10:16:04,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:04,559 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2022-12-14 10:16:04,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:16:04,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 10:16:04,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1356597482, now seen corresponding path program 8 times [2022-12-14 10:16:04,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:04,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666799132] [2022-12-14 10:16:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:17:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:17:00,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666799132] [2022-12-14 10:17:00,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666799132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:17:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057003627] [2022-12-14 10:17:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:17:00,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:00,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:17:00,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:17:00,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_988b76c1-6b26-4639-b43b-9056171b8d7a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process