./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur --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 404aca328acb019974a4013e1ced341d9a60ed0a822c21407be3158ee94f2c2d --- 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-38b53e6 [2022-11-26 00:04:56,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:04:56,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:04:56,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:04:56,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:04:56,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:04:56,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:04:56,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:04:56,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:04:56,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:04:56,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:04:56,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:04:56,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:04:56,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:04:56,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:04:56,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:04:56,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:04:56,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:04:56,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:04:56,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:04:56,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:04:56,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:04:56,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:04:56,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:04:56,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:04:56,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:04:56,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:04:56,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:04:56,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:04:56,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:04:56,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:04:56,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:04:56,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:04:56,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:04:56,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:04:56,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:04:56,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:04:56,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:04:56,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:04:56,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:04:56,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:04:56,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:04:56,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:04:56,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:04:56,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:04:56,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:04:56,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:04:56,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:04:56,633 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:04:56,633 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:04:56,633 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:04:56,633 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:04:56,635 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:04:56,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:04:56,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:04:56,635 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:04:56,635 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:04:56,636 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:04:56,636 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:04:56,636 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:04:56,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:04:56,637 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:04:56,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:04:56,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:04:56,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:04:56,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:04:56,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:04:56,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:04:56,639 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:04:56,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:04:56,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:04:56,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:04:56,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:04:56,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:04:56,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:56,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:04:56,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:04:56,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:04:56,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:04:56,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:04:56,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:04:56,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:04:56,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:04:56,643 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_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 404aca328acb019974a4013e1ced341d9a60ed0a822c21407be3158ee94f2c2d [2022-11-26 00:04:57,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:04:57,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:04:57,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:04:57,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:04:57,080 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:04:57,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2022-11-26 00:05:00,252 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:05:00,489 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:05:00,490 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2022-11-26 00:05:00,497 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/data/6dfda2c77/ba30c3d9aee9429b90f66b6147a6849c/FLAGcad121608 [2022-11-26 00:05:00,514 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/data/6dfda2c77/ba30c3d9aee9429b90f66b6147a6849c [2022-11-26 00:05:00,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:05:00,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:05:00,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:00,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:05:00,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:05:00,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3238898b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00, skipping insertion in model container [2022-11-26 00:05:00,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:05:00,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:00,709 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c[333,346] [2022-11-26 00:05:00,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:00,743 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:05:00,755 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c[333,346] [2022-11-26 00:05:00,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:00,777 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:05:00,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00 WrapperNode [2022-11-26 00:05:00,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:00,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:00,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:05:00,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:05:00,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,821 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-26 00:05:00,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:00,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:05:00,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:05:00,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:05:00,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:05:00,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:05:00,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:05:00,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:05:00,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (1/1) ... [2022-11-26 00:05:00,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:00,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:05:00,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:05:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:05:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:05:00,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:05:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:05:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:05:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:05:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:05:00,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:05:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:05:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:05:01,068 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:05:01,070 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:05:01,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:05:01,533 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:05:01,533 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:05:01,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:01 BoogieIcfgContainer [2022-11-26 00:05:01,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:05:01,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:05:01,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:05:01,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:05:01,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:00" (1/3) ... [2022-11-26 00:05:01,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39239cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:01, skipping insertion in model container [2022-11-26 00:05:01,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:00" (2/3) ... [2022-11-26 00:05:01,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39239cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:01, skipping insertion in model container [2022-11-26 00:05:01,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:01" (3/3) ... [2022-11-26 00:05:01,547 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_gen.c [2022-11-26 00:05:01,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:05:01,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:05:01,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:05:01,647 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;@2cdbe075, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:05:01,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:05:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2022-11-26 00:05:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:05:01,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:01,662 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:01,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash 705773047, now seen corresponding path program 1 times [2022-11-26 00:05:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:01,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934148632] [2022-11-26 00:05:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:01,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491858566] [2022-11-26 00:05:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:01,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:01,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:01,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:05:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:02,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:05:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:05:02,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:02,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934148632] [2022-11-26 00:05:02,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:02,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491858566] [2022-11-26 00:05:02,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491858566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:02,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:02,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:02,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164376728] [2022-11-26 00:05:02,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:05:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:05:02,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:02,231 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:05:04,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 00:05:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:04,338 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2022-11-26 00:05:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:05:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2022-11-26 00:05:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:04,350 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:05:04,351 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:05:04,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:04,362 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:04,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:05:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:05:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-26 00:05:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-11-26 00:05:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-26 00:05:04,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 12 [2022-11-26 00:05:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:04,419 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-26 00:05:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:05:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-26 00:05:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:05:04,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:04,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:04,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:05:04,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:04,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 411468084, now seen corresponding path program 1 times [2022-11-26 00:05:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:04,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772931993] [2022-11-26 00:05:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:04,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:04,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769370269] [2022-11-26 00:05:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:04,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:04,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:04,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:04,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:05:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:05:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:05:04,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:05:04,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772931993] [2022-11-26 00:05:04,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:04,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769370269] [2022-11-26 00:05:04,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769370269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:04,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724952313] [2022-11-26 00:05:04,906 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:05:04,906 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:04,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:04,917 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:04,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:05,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:05,102 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-26 00:05:05,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-26 00:05:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:05,192 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:05:05,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:05:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:05,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:05:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:06,004 INFO L321 Elim1Store]: treesize reduction 181, result has 15.8 percent of original size [2022-11-26 00:05:06,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 406 treesize of output 439 [2022-11-26 00:05:06,522 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-26 00:05:06,523 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 675 treesize of output 656 [2022-11-26 00:05:06,590 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-26 00:05:06,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 650 treesize of output 642 [2022-11-26 00:05:06,979 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:05:07,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 118 [2022-11-26 00:05:07,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-26 00:05:07,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-26 00:05:07,948 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:05:07,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-26 00:05:07,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-26 00:05:08,147 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 118 for LOIs [2022-11-26 00:05:08,203 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:58,789 WARN L233 SmtUtils]: Spent 50.53s on a formula simplification. DAG size of input: 60 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:06:52,740 WARN L233 SmtUtils]: Spent 31.10s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:06:52,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod (+ (* 4294967295 ~N~0) (* ~N~0 |ULTIMATE.start_main_~R~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~R~0#1| |ULTIMATE.start_main_~R~0#1|) 4294967296)) 4294967296)) 1 0)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (= |ULTIMATE.start_main_~j~0#1| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:52,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:52,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:52,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-26 00:06:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901530332] [2022-11-26 00:06:52,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:52,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:06:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:06:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=185, Unknown=9, NotChecked=0, Total=272 [2022-11-26 00:06:52,747 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:06:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:53,364 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-26 00:06:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:06:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 13 [2022-11-26 00:06:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:53,366 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:06:53,366 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:06:53,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 104.6s TimeCoverageRelationStatistics Valid=100, Invalid=233, Unknown=9, NotChecked=0, Total=342 [2022-11-26 00:06:53,368 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:53,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:06:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:06:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-26 00:06:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-11-26 00:06:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-26 00:06:53,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2022-11-26 00:06:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:53,374 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-26 00:06:53,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:06:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-26 00:06:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:06:53,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:53,376 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:53,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:53,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:53,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1092180681, now seen corresponding path program 2 times [2022-11-26 00:06:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120861235] [2022-11-26 00:06:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:53,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:53,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442726460] [2022-11-26 00:06:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:06:53,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:53,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:53,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b108c8f0-2f99-4c71-aab2-780472883734/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process