./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI --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 dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a --- 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-5e519f3 [2022-11-03 02:30:46,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:30:46,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:30:46,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:30:46,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:30:46,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:30:46,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:30:46,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:30:46,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:30:46,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:30:46,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:30:46,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:30:46,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:30:46,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:30:46,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:30:46,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:30:46,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:30:46,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:30:46,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:30:46,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:30:46,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:30:46,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:30:46,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:30:46,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:30:46,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:30:46,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:30:46,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:30:46,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:30:46,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:30:46,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:30:46,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:30:46,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:30:46,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:30:46,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:30:46,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:30:46,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:30:46,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:30:46,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:30:46,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:30:46,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:30:46,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:30:46,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:30:46,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:30:46,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:30:46,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:30:46,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:30:46,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:30:46,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:30:46,202 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:30:46,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:30:46,203 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:30:46,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:30:46,204 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:30:46,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:30:46,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:30:46,204 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:30:46,205 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:30:46,205 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:30:46,205 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:30:46,206 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:30:46,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:30:46,207 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:30:46,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:30:46,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:30:46,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:30:46,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:30:46,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:30:46,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:30:46,209 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:30:46,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:30:46,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:30:46,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:30:46,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:30:46,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:30:46,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:46,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:30:46,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:30:46,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:30:46,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:30:46,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:30:46,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:30:46,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:30:46,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:30:46,213 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_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a [2022-11-03 02:30:46,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:30:46,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:30:46,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:30:46,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:30:46,601 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:30:46,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-crafted/bor1.i [2022-11-03 02:30:46,701 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/data/7ed01c809/5eb2a02011b34180b06dd0664d8ea6fa/FLAG9036528b6 [2022-11-03 02:30:47,198 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:30:47,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/sv-benchmarks/c/array-crafted/bor1.i [2022-11-03 02:30:47,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/data/7ed01c809/5eb2a02011b34180b06dd0664d8ea6fa/FLAG9036528b6 [2022-11-03 02:30:47,539 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/data/7ed01c809/5eb2a02011b34180b06dd0664d8ea6fa [2022-11-03 02:30:47,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:30:47,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:30:47,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:47,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:30:47,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:30:47,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:47,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe8bf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47, skipping insertion in model container [2022-11-03 02:30:47,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:47,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:30:47,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:47,854 WARN L230 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_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/sv-benchmarks/c/array-crafted/bor1.i[1285,1298] [2022-11-03 02:30:47,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:47,881 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:30:47,922 WARN L230 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_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/sv-benchmarks/c/array-crafted/bor1.i[1285,1298] [2022-11-03 02:30:47,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:47,943 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:30:47,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47 WrapperNode [2022-11-03 02:30:47,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:47,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:47,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:30:47,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:30:47,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:47,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,009 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-11-03 02:30:48,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:48,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:30:48,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:30:48,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:30:48,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:30:48,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:30:48,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:30:48,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:30:48,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (1/1) ... [2022-11-03 02:30:48,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:48,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:30:48,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:30:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:30:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-11-03 02:30:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-11-03 02:30:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:30:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:30:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:30:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:30:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:30:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:30:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:30:48,227 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:30:48,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:30:48,381 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:30:48,420 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:30:48,420 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:30:48,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:48 BoogieIcfgContainer [2022-11-03 02:30:48,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:30:48,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:30:48,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:30:48,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:30:48,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:30:47" (1/3) ... [2022-11-03 02:30:48,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293075f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:48, skipping insertion in model container [2022-11-03 02:30:48,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:47" (2/3) ... [2022-11-03 02:30:48,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293075f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:48, skipping insertion in model container [2022-11-03 02:30:48,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:48" (3/3) ... [2022-11-03 02:30:48,447 INFO L112 eAbstractionObserver]: Analyzing ICFG bor1.i [2022-11-03 02:30:48,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:30:48,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:30:48,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:30:48,536 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;@32c548d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:30:48,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:30:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:30:48,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:48,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:48,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1439153059, now seen corresponding path program 1 times [2022-11-03 02:30:48,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:48,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948970196] [2022-11-03 02:30:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:49,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948970196] [2022-11-03 02:30:49,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948970196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:49,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:49,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:30:49,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941738293] [2022-11-03 02:30:49,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:49,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:49,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:49,139 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:49,210 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-03 02:30:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-03 02:30:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:49,221 INFO L225 Difference]: With dead ends: 33 [2022-11-03 02:30:49,221 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 02:30:49,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:49,229 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:49,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 02:30:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 02:30:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 02:30:49,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-03 02:30:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:49,303 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 02:30:49,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 02:30:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:30:49,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:49,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:30:49,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:49,308 INFO L85 PathProgramCache]: Analyzing trace with hash -538547963, now seen corresponding path program 1 times [2022-11-03 02:30:49,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:49,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479495525] [2022-11-03 02:30:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:49,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:49,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479495525] [2022-11-03 02:30:49,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479495525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:49,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127875389] [2022-11-03 02:30:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:49,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:49,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:49,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:49,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:30:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:30:49,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:49,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127875389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:49,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:49,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:30:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035555646] [2022-11-03 02:30:49,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:49,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:49,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:49,656 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:49,691 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-03 02:30:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-03 02:30:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:49,707 INFO L225 Difference]: With dead ends: 29 [2022-11-03 02:30:49,707 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 02:30:49,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:49,710 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:49,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 02:30:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 02:30:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 02:30:49,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-03 02:30:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:49,734 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 02:30:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 02:30:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:30:49,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:49,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:49,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:49,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:49,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash -807854650, now seen corresponding path program 1 times [2022-11-03 02:30:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381342406] [2022-11-03 02:30:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:49,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:30:50,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381342406] [2022-11-03 02:30:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381342406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826095709] [2022-11-03 02:30:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:50,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:50,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:30:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:30:50,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:50,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826095709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:50,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:50,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:30:50,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727881656] [2022-11-03 02:30:50,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:50,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:50,241 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:50,265 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-03 02:30:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:50,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-03 02:30:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:50,270 INFO L225 Difference]: With dead ends: 27 [2022-11-03 02:30:50,270 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:30:50,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:50,274 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:50,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:30:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 02:30:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-03 02:30:50,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-03 02:30:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:50,282 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-03 02:30:50,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-03 02:30:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:30:50,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:50,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:50,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:30:50,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:50,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash 34772627, now seen corresponding path program 1 times [2022-11-03 02:30:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016882539] [2022-11-03 02:30:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:30:50,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:50,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016882539] [2022-11-03 02:30:50,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016882539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:50,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145457710] [2022-11-03 02:30:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:50,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:50,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:30:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:30:50,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:30:50,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145457710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846887688] [2022-11-03 02:30:50,936 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:30:50,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:50,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:50,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:50,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,109 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:30:51,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:51,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:30:51,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:51,463 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:30:51,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:30:51,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:30:51,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:51,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:30:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:52,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 02:30:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:52,126 INFO L356 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-03 02:30:52,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-03 02:30:52,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:30:52,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:30:52,363 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:30:52,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:57,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-03 02:30:57,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:57,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:57,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-03 02:30:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857595954] [2022-11-03 02:30:57,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:30:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:30:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-03 02:30:57,621 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:30:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:57,657 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-03 02:30:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-03 02:30:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:57,658 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:30:57,658 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 02:30:57,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-03 02:30:57,660 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:57,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 02:30:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 02:30:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-03 02:30:57,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-03 02:30:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:57,666 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-03 02:30:57,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:30:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-03 02:30:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:30:57,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:57,667 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:57,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:57,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 02:30:57,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:57,884 INFO L85 PathProgramCache]: Analyzing trace with hash 160034795, now seen corresponding path program 2 times [2022-11-03 02:30:57,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:57,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141713988] [2022-11-03 02:30:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:57,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:30:57,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141713988] [2022-11-03 02:30:57,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141713988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17889252] [2022-11-03 02:30:57,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:57,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:57,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:58,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:30:58,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:30:58,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:30:58,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:30:58,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17889252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:58,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546550174] [2022-11-03 02:30:58,126 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:30:58,126 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:58,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:58,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:58,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,163 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:30:58,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:58,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,198 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:30:58,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:30:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,378 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:30:58,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:30:58,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:30:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:30:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:58,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:30:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:58,688 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:30:58,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:30:58,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:30:58,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:30:58,867 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:30:58,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:03,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_12 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_12 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:03,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:03,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:03,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 02:31:03,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031189037] [2022-11-03 02:31:03,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:03,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:31:03,940 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:31:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:03,974 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-03 02:31:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:31:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-03 02:31:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:03,976 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:31:03,976 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 02:31:03,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:31:03,978 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:03,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 02:31:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-03 02:31:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-03 02:31:03,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-03 02:31:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:03,984 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-03 02:31:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:31:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-03 02:31:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:31:03,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:03,986 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:04,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:31:04,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:04,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1885684020, now seen corresponding path program 3 times [2022-11-03 02:31:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:04,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065616502] [2022-11-03 02:31:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:04,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-03 02:31:04,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065616502] [2022-11-03 02:31:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065616502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287175784] [2022-11-03 02:31:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:31:04,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:04,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:04,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:31:04,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:31:04,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:04,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 02:31:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 02:31:04,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287175784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:04,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657190821] [2022-11-03 02:31:04,562 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:04,562 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:04,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:04,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:04,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,594 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:31:04,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,624 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:04,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:04,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:31:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:04,787 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:31:04,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:31:04,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:04,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:31:05,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:05,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:05,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:31:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:05,170 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:31:05,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:31:05,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:31:05,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:31:05,331 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:31:05,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:08,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:08,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:08,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:08,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-03 02:31:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547845818] [2022-11-03 02:31:08,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:08,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:31:08,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:31:08,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:31:08,536 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:31:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:08,609 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-03 02:31:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:31:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-03 02:31:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:08,611 INFO L225 Difference]: With dead ends: 49 [2022-11-03 02:31:08,611 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:31:08,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:31:08,613 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:08,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:31:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-03 02:31:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-03 02:31:08,619 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-03 02:31:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:08,619 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-03 02:31:08,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:31:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-03 02:31:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:31:08,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:08,621 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:08,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:08,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:08,847 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 210425085, now seen corresponding path program 4 times [2022-11-03 02:31:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662776228] [2022-11-03 02:31:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-03 02:31:09,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:09,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662776228] [2022-11-03 02:31:09,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662776228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:09,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705399441] [2022-11-03 02:31:09,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:31:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:09,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:09,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:31:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:31:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-03 02:31:09,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-03 02:31:09,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705399441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657268176] [2022-11-03 02:31:09,714 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:09,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:09,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:09,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:09,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,754 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:09,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:31:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:09,917 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:31:09,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:31:09,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:31:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:10,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:31:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:10,190 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:31:10,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:31:10,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:31:10,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:31:10,348 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:31:10,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:13,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:13,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:13,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:13,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-03 02:31:13,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267709249] [2022-11-03 02:31:13,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:31:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:31:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:31:13,367 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:31:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:13,470 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-03 02:31:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:31:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-03 02:31:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:13,472 INFO L225 Difference]: With dead ends: 62 [2022-11-03 02:31:13,472 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 02:31:13,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:31:13,474 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:13,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 02:31:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-03 02:31:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-03 02:31:13,490 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-03 02:31:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:13,491 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-03 02:31:13,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:31:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-03 02:31:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:31:13,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:13,495 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:13,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:13,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1481216765, now seen corresponding path program 5 times [2022-11-03 02:31:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552399848] [2022-11-03 02:31:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-03 02:31:14,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552399848] [2022-11-03 02:31:14,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552399848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858804893] [2022-11-03 02:31:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:31:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:14,656 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:14,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:31:14,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:31:14,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-03 02:31:14,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-03 02:31:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858804893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:15,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510646968] [2022-11-03 02:31:15,038 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:15,038 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:15,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:15,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:15,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,070 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:31:15,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:15,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,098 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:15,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:15,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:31:15,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,260 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:31:15,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:31:15,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:31:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 02:31:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:15,519 INFO L356 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-03 02:31:15,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-03 02:31:15,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:31:15,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:31:15,678 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:31:15,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:17,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:17,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:17,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:17,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-03 02:31:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49960685] [2022-11-03 02:31:17,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:31:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:31:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:31:17,050 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:31:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:17,172 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-03 02:31:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:31:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-03 02:31:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:17,184 INFO L225 Difference]: With dead ends: 69 [2022-11-03 02:31:17,187 INFO L226 Difference]: Without dead ends: 50 [2022-11-03 02:31:17,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:31:17,190 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:17,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-03 02:31:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-03 02:31:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-03 02:31:17,206 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-03 02:31:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:17,206 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-03 02:31:17,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:31:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-03 02:31:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:31:17,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:17,210 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:17,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:17,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:31:17,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -10477499, now seen corresponding path program 6 times [2022-11-03 02:31:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312408479] [2022-11-03 02:31:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:18,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312408479] [2022-11-03 02:31:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312408479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105273544] [2022-11-03 02:31:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:31:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:18,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:18,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:31:18,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:31:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:31:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:18,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:19,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105273544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898247183] [2022-11-03 02:31:19,767 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:19,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:19,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:19,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:19,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,807 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:19,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:19,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:19,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:31:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:19,962 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:31:19,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:31:20,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:20,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:20,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:31:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:20,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 02:31:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:20,246 INFO L356 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-03 02:31:20,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-03 02:31:20,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:31:20,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:31:20,406 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:31:20,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:25,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_36 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_36 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_36 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:25,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:25,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:25,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-03 02:31:25,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697012325] [2022-11-03 02:31:25,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:31:25,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:25,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:31:25,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:31:25,641 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:31:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:25,778 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-03 02:31:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:31:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-03 02:31:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:25,781 INFO L225 Difference]: With dead ends: 100 [2022-11-03 02:31:25,782 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 02:31:25,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:31:25,786 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:25,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 02:31:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 02:31:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-03 02:31:25,810 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-03 02:31:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:25,810 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-03 02:31:25,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:31:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-03 02:31:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:31:25,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:25,817 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:25,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:26,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:26,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1436572317, now seen corresponding path program 7 times [2022-11-03 02:31:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:26,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73060323] [2022-11-03 02:31:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:26,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:28,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:28,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73060323] [2022-11-03 02:31:28,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73060323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:28,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250580611] [2022-11-03 02:31:28,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:31:28,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:28,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:28,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:28,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:31:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:31:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:29,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:32,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250580611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:32,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667976650] [2022-11-03 02:31:32,405 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:32,405 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:32,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:32,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:32,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:32,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,442 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:32,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:32,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:31:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:32,593 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:31:32,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:31:32,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:31:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:32,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:31:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:32,903 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:31:32,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:31:32,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:31:32,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:31:33,057 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:31:33,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:36,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:36,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:36,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:36,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-11-03 02:31:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692824565] [2022-11-03 02:31:36,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:36,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 02:31:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 02:31:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:31:36,568 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:31:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:36,820 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-03 02:31:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 02:31:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-03 02:31:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:36,822 INFO L225 Difference]: With dead ends: 150 [2022-11-03 02:31:36,822 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 02:31:36,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:31:36,830 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:36,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 02:31:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-03 02:31:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-03 02:31:36,862 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-11-03 02:31:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:36,864 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-03 02:31:36,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:31:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-03 02:31:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 02:31:36,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:36,869 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:36,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:37,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:31:37,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1773791133, now seen corresponding path program 8 times [2022-11-03 02:31:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:37,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571626237] [2022-11-03 02:31:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:31:45,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571626237] [2022-11-03 02:31:45,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571626237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253153272] [2022-11-03 02:31:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:31:45,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:45,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:45,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:31:45,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:31:45,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:31:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-11-03 02:31:45,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-11-03 02:31:45,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253153272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459929968] [2022-11-03 02:31:45,848 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:31:45,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:45,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:45,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:45,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,877 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:31:45,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:45,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,907 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:45,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:45,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:31:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:46,038 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:31:46,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:31:46,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:46,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:31:46,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:46,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:46,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:31:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:46,255 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:31:46,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:31:46,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:31:46,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:31:46,387 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:31:46,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:54,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-03 02:31:54,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:54,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:54,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-11-03 02:31:54,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136851848] [2022-11-03 02:31:54,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-03 02:31:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-03 02:31:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-11-03 02:31:54,579 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:31:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:54,772 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-03 02:31:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-03 02:31:54,773 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-03 02:31:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:54,774 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:31:54,774 INFO L226 Difference]: Without dead ends: 130 [2022-11-03 02:31:54,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-11-03 02:31:54,777 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:54,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-03 02:31:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-03 02:31:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:31:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-03 02:31:54,786 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-11-03 02:31:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:54,787 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-03 02:31:54,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:31:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-03 02:31:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:31:54,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:54,789 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:54,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:55,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:31:55,011 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1239752187, now seen corresponding path program 9 times [2022-11-03 02:31:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868512096] [2022-11-03 02:31:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-03 02:32:03,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:03,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868512096] [2022-11-03 02:32:03,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868512096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:03,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956259865] [2022-11-03 02:32:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:32:03,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:03,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:03,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:03,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:32:03,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:32:03,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 02:32:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-03 02:32:03,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-03 02:32:08,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956259865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280957279] [2022-11-03 02:32:08,381 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:32:08,382 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:08,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:08,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:08,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,421 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:32:08,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:32:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,568 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:32:08,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:32:08,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:32:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:32:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:08,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:32:08,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:08,797 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:32:08,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:32:08,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:32:08,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:08,948 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:32:09,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:15,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7025#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (exists ((v_bor_~res~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:32:15,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:15,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:32:15,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 103 [2022-11-03 02:32:15,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696072736] [2022-11-03 02:32:15,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:15,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-03 02:32:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:15,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-03 02:32:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:32:15,174 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:32:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:15,351 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-11-03 02:32:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-03 02:32:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-11-03 02:32:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:15,357 INFO L225 Difference]: With dead ends: 160 [2022-11-03 02:32:15,357 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 02:32:15,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 100 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6788 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:32:15,359 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:32:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 02:32:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-03 02:32:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:32:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-11-03 02:32:15,368 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 155 [2022-11-03 02:32:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:15,368 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-11-03 02:32:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:32:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-11-03 02:32:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 02:32:15,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:15,371 INFO L195 NwaCegarLoop]: trace histogram [100, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:15,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 02:32:15,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:15,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash -981192611, now seen corresponding path program 10 times [2022-11-03 02:32:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:15,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481216619] [2022-11-03 02:32:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-03 02:32:16,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481216619] [2022-11-03 02:32:16,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481216619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212821763] [2022-11-03 02:32:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:32:16,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:16,266 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:16,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:32:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:32:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-03 02:32:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-03 02:32:16,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212821763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1665350264] [2022-11-03 02:32:16,919 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:32:16,919 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:16,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:16,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:16,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:16,950 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:32:16,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:16,981 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:32:16,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:17,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:32:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:17,117 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:32:17,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:32:17,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:32:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:32:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:17,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:32:17,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:17,409 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:32:17,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:32:17,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:32:17,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:17,527 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:32:17,575 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:22,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8552#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_60 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_60 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_60 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_60 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:32:22,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:22,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:32:22,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-03 02:32:22,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601429467] [2022-11-03 02:32:22,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:32:22,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:32:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:32:22,554 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:32:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:22,603 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2022-11-03 02:32:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:32:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2022-11-03 02:32:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:22,604 INFO L225 Difference]: With dead ends: 171 [2022-11-03 02:32:22,605 INFO L226 Difference]: Without dead ends: 143 [2022-11-03 02:32:22,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:32:22,606 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:22,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:32:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-03 02:32:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-03 02:32:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:32:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-11-03 02:32:22,614 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 156 [2022-11-03 02:32:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:22,615 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-11-03 02:32:22,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:32:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-11-03 02:32:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 02:32:22,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:22,618 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:22,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:22,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:32:22,843 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 786965917, now seen corresponding path program 11 times [2022-11-03 02:32:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171293352] [2022-11-03 02:32:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 6110 trivial. 0 not checked. [2022-11-03 02:32:24,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171293352] [2022-11-03 02:32:24,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171293352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459688627] [2022-11-03 02:32:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:32:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:24,352 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:24,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:32:24,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:32:24,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:32:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 1062 proven. 21 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2022-11-03 02:32:24,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2022-11-03 02:32:25,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459688627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:25,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980292094] [2022-11-03 02:32:25,082 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:32:25,082 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:25,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:25,083 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:25,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,110 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:32:25,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:32:25,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:25,251 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:32:25,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:32:25,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:32:25,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:32:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:25,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:32:25,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:25,514 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:32:25,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:32:25,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:32:25,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:25,632 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:32:25,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:32,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10355#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-03 02:32:32,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:32,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:32:32,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-11-03 02:32:32,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575407372] [2022-11-03 02:32:32,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:32,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:32:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:32:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2173, Unknown=1, NotChecked=0, Total=2652 [2022-11-03 02:32:32,920 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:32:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:33,034 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-11-03 02:32:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:32:33,034 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 192 [2022-11-03 02:32:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:33,035 INFO L225 Difference]: With dead ends: 192 [2022-11-03 02:32:33,035 INFO L226 Difference]: Without dead ends: 152 [2022-11-03 02:32:33,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=478, Invalid=2173, Unknown=1, NotChecked=0, Total=2652 [2022-11-03 02:32:33,036 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:33,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:32:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-03 02:32:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-03 02:32:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:32:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-11-03 02:32:33,045 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 192 [2022-11-03 02:32:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:33,045 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-11-03 02:32:33,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:32:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-11-03 02:32:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-03 02:32:33,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:33,047 INFO L195 NwaCegarLoop]: trace histogram [100, 69, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:33,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:32:33,268 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1469567442, now seen corresponding path program 12 times [2022-11-03 02:32:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:33,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928115841] [2022-11-03 02:32:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-03 02:32:34,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928115841] [2022-11-03 02:32:34,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928115841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588783136] [2022-11-03 02:32:34,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:32:34,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:34,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:34,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:32:35,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:32:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:35,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:32:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-03 02:32:35,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-03 02:32:36,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588783136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876222533] [2022-11-03 02:32:36,432 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:32:36,433 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:36,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:36,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:36,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,464 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:32:36,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:32:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:36,618 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:32:36,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:32:36,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:32:36,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:32:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 02:32:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:36,892 INFO L356 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-03 02:32:36,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-03 02:32:36,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:32:36,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:37,044 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:32:37,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:38,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12296#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:32:38,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:38,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:32:38,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-03 02:32:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651676023] [2022-11-03 02:32:38,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:32:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:32:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:32:38,344 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:32:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:38,461 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2022-11-03 02:32:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:32:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 203 [2022-11-03 02:32:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:38,463 INFO L225 Difference]: With dead ends: 226 [2022-11-03 02:32:38,463 INFO L226 Difference]: Without dead ends: 177 [2022-11-03 02:32:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:32:38,465 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:38,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:32:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-03 02:32:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-03 02:32:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:32:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-11-03 02:32:38,475 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 203 [2022-11-03 02:32:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:38,476 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-11-03 02:32:38,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:32:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-11-03 02:32:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 02:32:38,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:38,478 INFO L195 NwaCegarLoop]: trace histogram [144, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:38,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:38,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:32:38,692 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1704592509, now seen corresponding path program 13 times [2022-11-03 02:32:38,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:38,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177089889] [2022-11-03 02:32:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:38,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-03 02:32:42,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:42,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177089889] [2022-11-03 02:32:42,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177089889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:42,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334208114] [2022-11-03 02:32:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:32:42,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:42,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:42,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:32:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:32:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 4804 proven. 1176 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-03 02:32:43,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-03 02:32:46,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334208114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876619338] [2022-11-03 02:32:46,771 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:32:46,771 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:46,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:46,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:46,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:46,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,800 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:32:46,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:46,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:32:46,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:46,950 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:32:46,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:32:47,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:32:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:32:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:47,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:32:47,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,216 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:32:47,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:32:47,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:32:47,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:32:47,382 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:32:47,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:48,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14855#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_77 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:32:48,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:48,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:32:48,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-11-03 02:32:48,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565619879] [2022-11-03 02:32:48,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:48,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 02:32:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 02:32:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:32:48,884 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:32:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:49,098 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2022-11-03 02:32:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 02:32:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 278 [2022-11-03 02:32:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:49,104 INFO L225 Difference]: With dead ends: 301 [2022-11-03 02:32:49,105 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 02:32:49,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:32:49,108 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:49,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:32:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 02:32:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-03 02:32:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:32:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-11-03 02:32:49,122 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 278 [2022-11-03 02:32:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:49,123 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-11-03 02:32:49,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:32:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-11-03 02:32:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-11-03 02:32:49,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:49,126 INFO L195 NwaCegarLoop]: trace histogram [294, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:49,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:32:49,335 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1810292317, now seen corresponding path program 14 times [2022-11-03 02:32:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:49,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55574769] [2022-11-03 02:32:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 24455 refuted. 0 times theorem prover too weak. 24662 trivial. 0 not checked. [2022-11-03 02:33:01,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55574769] [2022-11-03 02:33:01,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55574769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891236683] [2022-11-03 02:33:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:33:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:01,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:01,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:33:03,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 02:33:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:33:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:33:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 19606 proven. 105 refuted. 0 times theorem prover too weak. 29406 trivial. 0 not checked. [2022-11-03 02:33:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49012 trivial. 0 not checked. [2022-11-03 02:33:05,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891236683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:05,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012290213] [2022-11-03 02:33:05,760 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:33:05,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:33:05,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:33:05,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:33:05,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:33:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,797 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:33:05,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:05,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,822 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:33:05,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:33:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:05,950 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:33:05,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:33:06,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:33:06,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:06,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:33:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:06,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:06,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:33:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:06,194 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:33:06,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:33:06,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:33:06,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:33:06,308 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:33:06,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:33:10,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18594#(and (exists ((v_bor_~res~0_BEFORE_RETURN_84 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:33:10,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:33:10,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:33:10,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 17, 17] total 131 [2022-11-03 02:33:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261187079] [2022-11-03 02:33:10,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:10,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-03 02:33:10,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-03 02:33:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-03 02:33:10,628 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:33:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:10,896 INFO L93 Difference]: Finished difference Result 368 states and 394 transitions. [2022-11-03 02:33:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-03 02:33:10,897 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 428 [2022-11-03 02:33:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:10,899 INFO L225 Difference]: With dead ends: 368 [2022-11-03 02:33:10,899 INFO L226 Difference]: Without dead ends: 244 [2022-11-03 02:33:10,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-03 02:33:10,902 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:33:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-03 02:33:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-03 02:33:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:33:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-11-03 02:33:10,915 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 428 [2022-11-03 02:33:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:10,915 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-11-03 02:33:10,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:33:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-11-03 02:33:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-03 02:33:10,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:10,919 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:10,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:33:11,135 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2018114578, now seen corresponding path program 15 times [2022-11-03 02:33:11,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280082333] [2022-11-03 02:33:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-03 02:33:14,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:14,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280082333] [2022-11-03 02:33:14,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280082333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:14,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732799631] [2022-11-03 02:33:14,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:33:14,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:14,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:14,519 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:14,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:33:15,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:33:15,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:33:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2733 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:33:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 20004 proven. 465 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-03 02:33:15,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-03 02:33:16,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732799631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240118751] [2022-11-03 02:33:16,901 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:33:16,901 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:33:16,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:33:16,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:33:16,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:33:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:16,927 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:33:16,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:16,950 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:33:16,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:16,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:33:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:17,075 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 02:33:17,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-03 02:33:17,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:33:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:33:17,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 02:33:17,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:17,318 INFO L356 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-03 02:33:17,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-03 02:33:17,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:33:17,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:33:17,461 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:33:17,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:33:22,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22549#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_89 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_89 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_89 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_89 4294967296))))) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:33:22,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:33:22,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:33:22,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-11-03 02:33:22,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863188195] [2022-11-03 02:33:22,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:22,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-03 02:33:22,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-03 02:33:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:33:22,726 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:33:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:22,834 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-11-03 02:33:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-03 02:33:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 447 [2022-11-03 02:33:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:22,837 INFO L225 Difference]: With dead ends: 383 [2022-11-03 02:33:22,837 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 02:33:22,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1296 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:33:22,839 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:22,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:33:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 02:33:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-03 02:33:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:33:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-03 02:33:22,853 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 447 [2022-11-03 02:33:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:22,854 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-03 02:33:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:33:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-03 02:33:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-03 02:33:22,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:22,858 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 62, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:22,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:23,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:33:23,071 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash 542916078, now seen corresponding path program 16 times [2022-11-03 02:33:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:23,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039911312] [2022-11-03 02:33:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-03 02:33:29,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:29,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039911312] [2022-11-03 02:33:29,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039911312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:29,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779185410] [2022-11-03 02:33:29,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:33:29,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:29,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:29,891 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:29,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:33:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2957 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:33:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 20004 proven. 1953 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-03 02:33:31,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-03 02:33:34,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779185410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:34,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399135016] [2022-11-03 02:33:34,699 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:33:34,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:33:34,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:33:34,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:33:34,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:33:34,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,729 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:33:34,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,755 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:33:34,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 02:33:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,882 INFO L356 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-03 02:33:34,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-03 02:33:34,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:33:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:34,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-03 02:33:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:35,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:35,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:33:35,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:35,087 INFO L356 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-03 02:33:35,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-03 02:33:35,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:33:35,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:33:35,198 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-03 02:33:35,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:33:36,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26829#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_96 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) (- 4294967296))))))' at error location [2022-11-03 02:33:36,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:33:36,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:33:36,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-11-03 02:33:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7989377] [2022-11-03 02:33:36,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:36,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-03 02:33:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-03 02:33:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-03 02:33:36,802 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:33:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:36,997 INFO L93 Difference]: Finished difference Result 420 states and 461 transitions. [2022-11-03 02:33:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 02:33:36,998 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 479 [2022-11-03 02:33:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:37,000 INFO L225 Difference]: With dead ends: 420 [2022-11-03 02:33:37,000 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 02:33:37,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1360 SyntacticMatches, 27 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-03 02:33:37,002 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:37,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:33:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 02:33:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-03 02:33:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:33:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-11-03 02:33:37,019 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 479 [2022-11-03 02:33:37,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:37,028 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-11-03 02:33:37,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:33:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-11-03 02:33:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-03 02:33:37,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:37,036 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 99, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:37,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:37,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b692d73-7136-4f86-bc4b-6d4d0fd07e8a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:37,251 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1090664405, now seen corresponding path program 17 times [2022-11-03 02:33:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:37,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115647746] [2022-11-03 02:33:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms