./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/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_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/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_cc23db56-9c11-48a1-a3c4-b779278b69f9/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 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 --- 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 01:59:33,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:59:33,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:59:33,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:59:33,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:59:33,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:59:33,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:59:33,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:59:33,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:59:33,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:59:33,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:59:33,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:59:33,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:59:33,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:59:33,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:59:33,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:59:33,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:59:33,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:59:33,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:59:33,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:59:33,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:59:33,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:59:33,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:59:33,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:59:33,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:59:33,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:59:33,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:59:33,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:59:33,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:59:33,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:59:33,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:59:33,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:59:33,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:59:33,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:59:33,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:59:33,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:59:33,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:59:33,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:59:33,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:59:33,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:59:33,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:59:33,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:59:33,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:59:33,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:59:33,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:59:33,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:59:33,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:59:33,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:59:33,572 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:59:33,573 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:59:33,573 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:59:33,573 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:59:33,573 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:59:33,574 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:59:33,574 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:59:33,574 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:59:33,574 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:59:33,575 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:59:33,575 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:59:33,575 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:59:33,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:59:33,576 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:59:33,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:59:33,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:59:33,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:59:33,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:59:33,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:59:33,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:59:33,578 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:59:33,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:59:33,579 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:59:33,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:59:33,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:59:33,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:59:33,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:33,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:59:33,580 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:59:33,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:59:33,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:59:33,581 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:59:33,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:59:33,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:59:33,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:59:33,582 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_cc23db56-9c11-48a1-a3c4-b779278b69f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 [2022-11-03 01:59:33,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:59:34,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:59:34,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:59:34,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:59:34,011 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:59:34,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2022-11-03 01:59:34,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/data/8421582f0/98c5b18ffb684cd2bd87e66be163dce2/FLAGfbf7b93fc [2022-11-03 01:59:34,653 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:59:34,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2022-11-03 01:59:34,660 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/data/8421582f0/98c5b18ffb684cd2bd87e66be163dce2/FLAGfbf7b93fc [2022-11-03 01:59:35,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/data/8421582f0/98c5b18ffb684cd2bd87e66be163dce2 [2022-11-03 01:59:35,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:59:35,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:59:35,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:35,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:59:35,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:59:35,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d52fe16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35, skipping insertion in model container [2022-11-03 01:59:35,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:59:35,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:59:35,239 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_cc23db56-9c11-48a1-a3c4-b779278b69f9/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2022-11-03 01:59:35,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:35,265 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:59:35,277 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_cc23db56-9c11-48a1-a3c4-b779278b69f9/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2022-11-03 01:59:35,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:35,298 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:59:35,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35 WrapperNode [2022-11-03 01:59:35,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:35,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:35,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:59:35,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:59:35,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,337 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2022-11-03 01:59:35,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:35,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:59:35,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:59:35,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:59:35,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,378 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:59:35,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:59:35,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:59:35,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:59:35,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (1/1) ... [2022-11-03 01:59:35,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:35,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:59:35,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:59:35,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:59:35,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:59:35,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:59:35,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:59:35,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:59:35,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:59:35,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:59:35,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:59:35,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:59:35,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:59:35,557 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:59:35,559 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:59:35,767 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:59:35,809 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:59:35,810 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 01:59:35,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:35 BoogieIcfgContainer [2022-11-03 01:59:35,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:59:35,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:59:35,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:59:35,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:59:35,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:59:35" (1/3) ... [2022-11-03 01:59:35,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b23cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:35, skipping insertion in model container [2022-11-03 01:59:35,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:35" (2/3) ... [2022-11-03 01:59:35,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b23cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:35, skipping insertion in model container [2022-11-03 01:59:35,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:35" (3/3) ... [2022-11-03 01:59:35,836 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2022-11-03 01:59:35,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:59:35,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:59:35,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:59:35,999 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;@5b8d937b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:59:36,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:59:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:59:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:59:36,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:36,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:36,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1629969816, now seen corresponding path program 1 times [2022-11-03 01:59:36,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:36,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566099918] [2022-11-03 01:59:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:36,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566099918] [2022-11-03 01:59:36,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566099918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:36,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:36,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:59:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931665184] [2022-11-03 01:59:36,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:36,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:36,431 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:36,516 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2022-11-03 01:59:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:59:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:36,528 INFO L225 Difference]: With dead ends: 32 [2022-11-03 01:59:36,529 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 01:59:36,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:36,538 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:36,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 01:59:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 01:59:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:59:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 01:59:36,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2022-11-03 01:59:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:36,589 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 01:59:36,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 01:59:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:59:36,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:36,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:59:36,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:36,594 INFO L85 PathProgramCache]: Analyzing trace with hash 761335963, now seen corresponding path program 1 times [2022-11-03 01:59:36,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:36,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575066456] [2022-11-03 01:59:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:36,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:36,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575066456] [2022-11-03 01:59:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575066456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2705682] [2022-11-03 01:59:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:36,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:36,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:36,755 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:36,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:59:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:36,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:59:36,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:36,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:36,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2705682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:36,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280528159] [2022-11-03 01:59:36,921 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:59:36,922 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:36,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:36,930 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:36,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,093 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-03 01:59:37,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-03 01:59:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,204 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:59:37,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:59:37,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 01:59:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:37,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:37,629 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 01:59:37,630 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-03 01:59:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:37,769 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:59:37,770 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:59:37,841 INFO L356 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-11-03 01:59:37,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2022-11-03 01:59:37,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:37,977 INFO L356 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-03 01:59:37,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-03 01:59:38,032 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-03 01:59:38,057 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:39,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_1| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_1|) (= (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_1|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_1|) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_1|) (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:39,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:39,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:39,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 01:59:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681304597] [2022-11-03 01:59:39,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:59:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:59:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:59:39,458 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:39,532 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-11-03 01:59:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:59:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:59:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:39,533 INFO L225 Difference]: With dead ends: 37 [2022-11-03 01:59:39,533 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 01:59:39,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:59:39,535 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:39,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 01:59:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 01:59:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:59:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-03 01:59:39,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2022-11-03 01:59:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:39,542 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-03 01:59:39,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-03 01:59:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:59:39,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:39,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:39,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:39,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:39,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:39,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1625783208, now seen corresponding path program 2 times [2022-11-03 01:59:39,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:39,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239310922] [2022-11-03 01:59:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:39,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:59:39,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:39,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239310922] [2022-11-03 01:59:39,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239310922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:39,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004869791] [2022-11-03 01:59:39,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:59:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:39,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:59:40,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:59:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:59:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:59:40,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:59:40,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004869791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589677310] [2022-11-03 01:59:40,162 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:59:40,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:40,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:40,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:40,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,248 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-03 01:59:40,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-03 01:59:40,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,349 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:59:40,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:59:40,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:59:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:40,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:40,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:40,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:40,638 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:59:40,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-03 01:59:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:41,125 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:59:41,128 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:59:41,209 INFO L356 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-11-03 01:59:41,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2022-11-03 01:59:41,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:41,330 INFO L356 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-03 01:59:41,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-03 01:59:41,380 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-03 01:59:41,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:42,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (exists ((|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_2| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_2|) (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_2|) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2|) (= (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_2|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2|) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:42,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:42,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:42,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 01:59:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995184162] [2022-11-03 01:59:42,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:59:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:59:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:59:42,878 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:42,987 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-03 01:59:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:59:42,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 01:59:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:42,989 INFO L225 Difference]: With dead ends: 52 [2022-11-03 01:59:42,989 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 01:59:42,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:59:42,991 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:42,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 01:59:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 01:59:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:59:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-03 01:59:42,998 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 16 [2022-11-03 01:59:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-03 01:59:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-03 01:59:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:59:43,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:43,000 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:43,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:43,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -487711352, now seen corresponding path program 3 times [2022-11-03 01:59:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524012596] [2022-11-03 01:59:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:59:43,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:43,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524012596] [2022-11-03 01:59:43,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524012596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:43,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593151299] [2022-11-03 01:59:43,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:59:43,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:43,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:43,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:59:43,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:59:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:59:43,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:59:44,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593151299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386455712] [2022-11-03 01:59:44,127 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:59:44,127 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:44,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:44,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:44,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,237 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:59:44,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:59:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-03 01:59:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:59:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:44,544 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:59:44,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-03 01:59:44,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:44,999 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:59:44,999 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:59:45,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:45,056 INFO L356 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2022-11-03 01:59:45,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2022-11-03 01:59:45,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:45,164 INFO L356 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-03 01:59:45,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-03 01:59:45,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:45,324 INFO L356 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-03 01:59:45,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-03 01:59:45,364 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-03 01:59:45,395 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:46,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3|) (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3|) (= |__VERIFIER_assert_#in~cond| (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_3|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3|) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_3|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:46,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:46,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:46,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 01:59:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422684475] [2022-11-03 01:59:46,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:46,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:59:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:59:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:59:46,911 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:47,096 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2022-11-03 01:59:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:59:47,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 01:59:47,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:47,098 INFO L225 Difference]: With dead ends: 82 [2022-11-03 01:59:47,098 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 01:59:47,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:59:47,100 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:47,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 01:59:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-03 01:59:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:59:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-11-03 01:59:47,109 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2022-11-03 01:59:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:47,109 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-11-03 01:59:47,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-11-03 01:59:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:59:47,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:47,111 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:47,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:47,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:47,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1925937480, now seen corresponding path program 4 times [2022-11-03 01:59:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:47,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114646677] [2022-11-03 01:59:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 01:59:48,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:48,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114646677] [2022-11-03 01:59:48,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114646677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:48,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098428219] [2022-11-03 01:59:48,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:59:48,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:48,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:48,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:59:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:59:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 01:59:48,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 01:59:49,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098428219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673131723] [2022-11-03 01:59:49,665 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:59:49,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:49,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:49,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:49,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,763 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:59:49,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:59:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-03 01:59:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 01:59:49,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:49,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:50,068 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 01:59:50,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-03 01:59:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:50,473 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 01:59:50,474 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 01:59:50,524 INFO L356 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-11-03 01:59:50,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2022-11-03 01:59:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:50,615 INFO L356 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2022-11-03 01:59:50,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2022-11-03 01:59:50,664 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-03 01:59:50,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:52,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1329#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_4| Int)) (and (< 0 |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_4|) (<= 0 |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_4|) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4|) (= |__VERIFIER_assert_#in~cond| (ite (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#C~0#1.base_BEFORE_CALL_4|) 0) |v_ULTIMATE.start_main_~j~0#1_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4|) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:52,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:52,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:52,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-03 01:59:52,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531098696] [2022-11-03 01:59:52,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:52,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 01:59:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 01:59:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:59:52,203 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:52,581 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2022-11-03 01:59:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 01:59:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 01:59:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:52,586 INFO L225 Difference]: With dead ends: 142 [2022-11-03 01:59:52,587 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 01:59:52,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:59:52,591 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:52,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:59:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 01:59:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-03 01:59:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:59:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-11-03 01:59:52,622 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 52 [2022-11-03 01:59:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:52,622 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-11-03 01:59:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-11-03 01:59:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 01:59:52,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:52,630 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:52,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:52,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 633245896, now seen corresponding path program 5 times [2022-11-03 01:59:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126448912] [2022-11-03 01:59:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-03 01:59:56,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126448912] [2022-11-03 01:59:56,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126448912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150253567] [2022-11-03 01:59:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:59:56,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:56,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc23db56-9c11-48a1-a3c4-b779278b69f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process